Aini Aziziah Ramli, Nor Hasniza Ibrahim, Johari Bin Surif, Muhammad Abd Hadi Bunyamin, Rahimah Jamaluddin & Nurdiana Abdullah. (2017). Teachers' readiness in teaching stem education. Man in India, 97 (13). pp. 343-350. ISSN 0025-1569.

Aminah Ayob, Mohd Nasir Ibrahim, Ong Eng Tek, Mazlina Adnan., Noriah Ishak., & Jameyah Sheriff. (2015). Laporan kajian STEM untuk permata negara. Bahagian permata, Jabatan Perdana Menteri Malaysia.

Bagiati, A. (2011). Early Engineering: A Developmentally Appropriate Curriculum for Young Children. Doctoral Dissertation, School of Engineering Education, Purdue University.

Bers, M.U. (2008). Blocks, robots and computers: Learning about technology in early childhood.I New York: Teacher’s College Press.

Brown, R., Brown, J., Reardon, K., & Merrill, C. (2011). Understanding STEM: Current perceptions.Technology and Engineering Teacher, 70(1), 5-9. Retrieved from http://www.iteaconnect.org/ Publications/ TTTarticleindex13.htm.

Creswell, J. W., Hanson, W. E., Clark Plano, V. L., & Morales, A. (2007). Qualitative research designs: Selection and implementation. The counseling psychologist, 35(2), 236-264.

Cunha, F. & Heckman, J. (2007). The technology of skill formation. American Economic Review, 97(2), 31- 47.4

Denzin, K. N., & Lincoln, S. Y. (2000). Handbook of Qualitative Research (2nd ed.). London: SAGE.

Donnelley Smith, A. R. (2018). Self-Efficacy of Early Childhood Teachers in Science, Technology, Engineering, and Mathematics.

Hanushek, E. A., Kain, J. F., & Rivkin, S. G. (2004). Why public schools lose teachers. Journal of Human Resources, 39(2), 326–354

Hanushek, E. A., & Rivkin, S. G. (2007). Pay, working conditions, and teacher quality. The future of children, 69-86.

Helm, J. H., & Katz. L. G. (2001). Young Investigators: The project approach in the early years. New York, NY: Teachers College Press.

Jones, M. G., Jones, B. D., & Hargrove, T. Y. (2003). The unintended consequences of high-stakes testing. Lanham, MD: Rowman & Littlefield

Kelley, T. R., & Knowles, J. G. (2016). A conceptual framework for integrated STEM education. International Journal of STEM Education, 3(1), 11.

Kementerian Pendidikan Malaysia (2015). Annual Report 2015 MALAYSIA EDUCATION BLUEPRINT 2013-2025. Malaysia.

Li, Y. (2014). International journal of STEM education—A platform to promote STEM education and research worldwide. International Journal of STEM Education 2014 1:1

Margot, K. C., & Kettler, T. (2019). Teachers’ perception of STEM integration and education: A systematic literature review. International Journal of STEM Education, 6(1), 2.

McConnell, J. R. (2017). A model for understanding teachers’ intentions to remain in STEM education. International Journal of STEM Education, 4(1), 7. Diperolehi daripada https://www.springeropen.com/track/pdf/10.1186/s40594-017-0061- 8?site=stemeducationjournal.springeropen.com

McClure, E., Guernsey, L., Clements, D., Bales, S., Nichols, J., Kendall-Taylor, N., et al. (2017). STEM starts early: Grounding science, technology, engineering, and math education in early childhood. New York: The Joan Ganz Cooney Center at Sesame Workshop.

Merriam, S. B. (1998). Case Study Research in Education: A Qualitative Approach. CA: Jossey-Bass Inco.

Miles, M. B., Huberman, A. M. & Saldana, J. (2014). Qualitative data analysis: A methods sourcebook. (3rd ed.). Thousand Oaks, CA: Sage Publication, Inc.

Moore, T. J., Johnson, C. C., Peter-Burton, E. E., & Guzey, S. S. (2016). The need for a STEM road map. In C. C. Johnson, E. E. Peter-Burton, & T. J. Moore (Eds.), STEM road map: Aframework for integrated STEM education (pp. 3-12). NY: Routledge Taylor & Francis Group.

Nadelson, L. S., Seifert, A., Moll, A. J., & Coats, B. (2012). i-stem summer institute: an integrated approach to teacher professional development in stem. Journal of STEM Education: Innovations and Research, 13(2), 69–83. Diperolehi daripada www.jstem.org

Ochterski, J., & Lupacchino-Gilson, L. (2016). Getting an A in STEM: Beginning a steam collaboration between art and chemistry students. The Science Teacher, 83(7), 39. doi:10.2505/4/tst16_083_07_39

Othman Lebar. (2017). Penyelidikan Kualitatif: Pengenalan kepada teori dan metode. (Edisi kedua). Tanjong Malim: Universiti Pendidikan Sultan Idris.

Sanders, M. (2009) STEM, STEM education, STEMmania. The Technology Teacher, 68(4).20-26.

Sobey, N. (2019). Does Working in Collaborative Groups to Complete STEM Design Challenges Increase Student Engagement Among Preschool-aged Children? (Doctoral dissertation, Hofstra University).

Stohlmann, M., Moore, T. J. & Roehrig, G. H. (2012). Considerations for teaching integrated STEM education. Journal of Pre-College Engineering Education Research, 2(1), Article 4. https://doi.org/10.5703/1288284314653

Tight, M. (2017). Understanding case study research: Small-scale research with meaning. (1st edition). London, Sage.

Torres-Crespo, M. N., Kraatz, E., & Pallansch, L. (2014). From Fearing STEM to Playing with It: The Natural Integration of STEM into the Preschool Classroom. SRATE Journal, 23(2), 8-16.

Wahono, B., & Chang, C. Y. (2019). Assessing teacher’s attitude, knowledge, and application (aka) on stem: an effort to foster the sustainable development of stem education. Sustainability, 11(4), 950.

Winarni, J., Zubaidah,. S., Koes, H. S., (2016). STEM: Apa, Mengapa, dan Bagaimana. Prosiding Seminar Pendidikan IPA Pascasarjana Universitas Negeri Malang. Vol. 1, 2016, ISBN: 978-602-9286-21-2.

Yin, R. K. (2015). Qualitative research from start to finish. (2nd ed.). New York, NY: The Guilford Prublications.