Andersson, P., & Köpsén, S. (2019). VET teachers between school and working life: Boundary processes enabling continuing professional development. Journal of Education and Work, 1–15. doi:10.1080/13639080. 2019. 1673888

Bada, H. A., Tengku Ariffin, T.F., & Nordin, H. (2020). The effectiveness of teachers in Nigerian secondary schools: The role of instructional leadership of principals. International Journal of Leadership in Education, 1–28. doi:10.1080/13603124.2020.1811899

Bautista, A., Wong, J., & Gopinathan, S. (2015). Teacher professional development in Singapore: Depicting the landscape. Psychology, Society, & Education, 7(3), 311-326. Diperoleh daripada https://repository. nie.edu.sg/ bitstream/10497/18171/1/PSE-7-3-311.pdf

Bautista, A., Yau, X., & Wong, J. (2017). High-quality music teacher professional development: A review of the literature. Music Education Research, 19(4), 455-469. https://doi.org/10.1080/14613808.2016.1249357

Boahin, P., & Hofman, W. H. A. (2014). Perceived effects of competency-based training on the acquisition of professional skills. International Journal of Educational Development, 36, 81–89. doi.org/10.1016/j. ijedudev.2013.11.003

Borko, H. (2004). Professional development and teacher learning: Mapping the terrain. Educational Researcher, 33(8), 3-15.

Chinedu, C. C., Wan Mohamed, W. A., & Ajah, A. O. (2018). A systematic review on education for sustainable development: Enhancing TVE teacher training programme. Journal of Technical Education and Training, 10(1). Diperoleh daripada https://publisher.uthm.edu.my/ojs/index.php/JTET/article/view/ 1678

Desimone, L. M. (2009). Improving impact studies of teachers’ professional development: Toward better conceptualizations and measures. Educational Researcher, 38(3), 181– 199. doi:10.3102/0013189x08 331140

Diep, P.C., & Hartmann, M. (2016). Green skills in vocational teacher education – A model of pedagogical competence for a world of sustainable development. TVET@Asia, 6, 1-19. Diperoleh daripada http://tvet-online.asia/issue/6/diep-hartmann

Fejes, A., & Kopsen, S. (2012). Vocational teachers’ identity formation through boundary crossing. Journal of Education and Work, 27(3), 265–283. doi:10.1080/13639080.2012.742181

Gore, J., Lloyd, A., Smith, M., Bowe, J., Ellis, H., & Lubans, D. (2017). Effects of professional development on the quality of teaching: Results from a randomised controlled trial of Quality Teaching Rounds. Teaching and Teacher Education, 68, 99-113.

Hauge, K. (2019). Teachers’ collective professional development in school: A review study. Cogent Education, 6: 1619223.doi:10.1080/2331186X.2019.1619223

Hiew, W., & Murray, J. (2018). Issues with effective design of an ESL teacher professional development programme in Sabah, Malaysia. Manu: Jurnal Pusat Penataran Ilmu dan Bahasa (PPIB), 51 - 76. Diperoleh daripada https://doi.org/10.51200/manu.v0i0.1582

Hoekstra, A., Kuntz, J., & Newton, P. (2018). Professional learning of instructors in vocational and professional education. Professional Development in Education, 44(2), 237-253. doi: 10.1080/19415257.2017.12805 23

Ismail, K., Nopiah, Z. M., Rasul, M. S., & Leong, P. C. (2017). Malaysian teachers’ competency in technical vocational education and training: A review. In Abdullah et al. (Eds.), Regionalization and Harmonization in TVET. London: Taylor & Francis Group

Johnson, R. B., & Christensen, L. (2014). Educational research: Quantitative, qualitative and mixed approaches (5th ed.). Thousand Oaks, CA: SAGE Publications, Inc.

Junita Sulaiman & Wan Mohd Rashid Wan Ahmad. (2018). Kompetensi dalam menentukan profesionalisme guru vokasional di Malaysia: Cabaran ke arah pembangunan profesionalisme guru TVET. Online Journal for TVET practitioners: Multidisciplinary Research in Education, 3(special issue), 13-18. Diperoleh daripada https://publisher.uthm.edu.my/ojs/index.php/oj-tp/article/view/4794

Kementerian Pendidikan Malaysia. (2018). Laporan Tahunan 2017: Pelan Pembangunan Pendidikan Malaysia 2013-2025. Putrajaya: Kementerian Pendidikan Malaysia.

Kennedy, M. M. (2016). How does professional development improve teaching? Review of Educational Research, 86(4), 945–980. doi:10.3102/0034654315626800

Khan, S., & Abdullah, N. (2019). The impact of staff training and development on teachers’ productivity. Economics, Management and Sustainability, 4(1), 37-45. doi:10.14254/jems.2019.4-1.4

Kopsen, S. (2014). How vocational teachers describe their vocational teacher identity. Journal of Vocational Education & Training, 66(2), 194-21. doi:10.1080/13636820.2014.894554

Kopsen, S. & Andersson, P. (2018). Boundary processes in connection with students’ workplace learning: Potentials for VET teachers’ continuing professional development. Nordic Journal of Vocational Education and Training (NJVET), 8(1), 58–75. Diperoleh daripada https://njvet.ep.liu.se/article/view/ 276

Kyriakides, L., Christoforidou, M., Panayiotou, A., & Creemers, B.P.M. (2017). The impact of a three-year teacher professional development course on quality of teaching: Strengths and limitations of the dynamic approach. European Journal of Teacher Education, 1-22. doi: 10.1080/02619768.2017.1349093

Mohd Hashim, M. H., & Abubakar, B. (2017). The availability of electronic courses using ICT infrastructure in teaching and learning among teachers in Nigeria's TVET institutions. Pertanika Journal of Social Sciences & Humanities, 25 (Special issue). 17 – 28.

Opfer, V. D., & Pedder, D. (2011). Conceptualizing teacher professional learning. Review of Educational Research, 81(3), 376–407. doi:10.3102/0034654311413609

Phin, C. (2014). Teacher competence and teacher quality in Cambodia’s educational context linked to in-service teacher training. An examination based on a questionnaire survey. International journal of educational administration and policy studies, 6(4), 62-69. doi:10.5897/IJEAPS2013.0326.

Ramli Bakar. (2018). The influence of professional teachers on Padang Vocational School students’ achievement. Kasetsart Journal of Social Sciences, 39, 67-72. Diperoleh daripada https://doi.org/10.1016/j.kjss. 2017. 12.017

Ronfeldt, M., Farmer, S. O., McQueen, K., & Grissom, J. A. (2015). Teacher collaboration in instructional teams and student achievement. American Educational Research Journal, 52(3), 475– 514. doi:10.3102/ 0002831215585562

Salwati Shafee, Simin Ghavifekr & Zuraidah Abdullah. (2019). Leadership role of coaches in improving teachers’ instructional practices. MOJEM: Malaysian Online Journal of Educational Management, 7(1), 92-112.

Sekaran, U., & Bougie, R. (2016). Research methods for business: A skill building approach (7th ed.). West Sussex, UK: John Wiley & Sons Ltd.

Soine, K. M., & Lumpe, A. (2014). Measuring characteristics of teacher professional development. Teacher Development, 18(3), 303–333. doi:10.1080/13664530.2014.911775

Stanton, K., Cawthon, S., & Dawson, K. (2017). Self-efficacy, teacher concerns, and levels of implementation among teachers participating in drama-based instruction professional development. Teacher Development, 22(1), 51–77. doi:10.1080/13664530.2017.1308430

Tran, L. T., & Pasura, R. (2020). The nature of teacher professional development in Australian International Vocational Education. Journal of Further and Higher Education, 1–14. doi:10.1080/ 0309877x.2019. 1702153

United Nations Educational Scientific and Cultural Organization. (2017). Education for sustainable development goals: Learning objectives. Diperoleh daripada https://unesdoc.unesco.org/ark:/48223/ pf0000247444

Visnovska, J., & Cobb, P. (2015). Learning about whole-class scaffolding from a teacher professional development study. ZDM Mathematics Education, 47, 1133–1145. doi:10.1007/s11858-015-0739-7

Wilson, P. H., Sztajn, P., Edington, C., Webb, J., & Myers, M. (2017). Change in teachers´ discourse about students in a professional development on learning trajectories. American Educational Research Journal, 54(3), 568–604. doi:10.3102/0002831217693801

Zorkic, T.J., & Jovanovic, V. (2020). Constructivist beliefs and teaching practices in different school environments. Malta Review of Educational Research, 14 (Supplement Issue), 13-26.