Abdul Hakim Ali Abdul Aziz, Radzuwan Ab Rashid., & Wan Zhafirah Wan Zainudin. (2018). The enactment of the Malaysian Common European Framework of Reference (CEFR): National master trainer's reflection. Indonesian Journal of Applied Linguistics8(2), 409-417. https://doi.org/10.17509/ijal.v8i2.13307.
Ariz, N. A. (2017, October 11). Imported English textbooks will boost students' proficiency. Free Malaysia Today. https://www.freemalaysiatoday.com/category/nation/2017/10/07/importedenglish-textbooks-will-boost-students-proficiency/.
Chong, G., & Hamidah Yamat. (2021). Teachers' implementation of CEFR - aligned Curriculum: A preliminary study. Journal of English Language Teaching and Applied Linguistics. 3(3), 5-9. https://doi.org/10.32996/jeltal.2021.3.3.2.
Franz, J., & Teo, A. (2017). "A2 is normal" - Thai secondary school English teachers' encounters with the CEFR. RELC Journal, 49(3), 1-7. https://doi.org/10.1177/0033688217738816.
Koeber, A., & McMichael, L. (2008). Qualitative sampling methods: A primer for technical communicators. Journal of Business and Technical Communication,22(45), 454-473. https://doi.org/10.1177/1050651908320362.
Krejcie, R. V., & Morgan, D. W. (1970). Determining sample size for research activities. Educational and Psychology Measurement Journal,30(3), 607-610. https://doi.org/10.1177/001316447003000308.
Larenas, C. D., Hernandez, P. A., & Navarrete, M. O. (2015). A case study on EFL teachers' beliefs about the teaching and learning of English in Public Education. PortaLinguarum, 23, 171-186. https://doi.org/ https://doi.org/10.30827/digibug.53765. Let's have our own textbooks. (2018, February 1). The Star Online. https://www.thestar.com.my/news/education/2018/02/04/lets-have-our-own-textbooks.
Lowe, A., Norris, A. C., Farris, A. J., & Babbage. D. R. (2018). Quantifying thematic saturation in qualitative data analysis. Field Methods Journal, 30(3), 191-207. https://doi.org/10.1177/1525822X17749386.
McDonough, J., Shaw, C., & Masuhara, H. (2013). Materials and Methods in ELT: A Teacher's Guide (3rd ed.). Blackwell Publishing.
Mede, E., & Yalcin, S. (2019). Utilizing textbook adaptation strategies: Experiences and challenges of novice and experienced EFL instructors. TESOL International Journal,14(1), 91-104. ERIC. https://files.eric.ed.gov/fulltext/EJ1244104.pdf.
Mohd Iqbal Ahamat, & Muhammad Kamarul Kabilan. (2022). Material Adaptation among Rural Primary School English Language Teachers. 3L: Language, Linguistics, Literature, The Southeast Asian Journal of English Language Studies,28(1), 90-102. https://doi.org/10.17576/3L-2022-2801-07.
Mohd Lukman, A, H., & Parilah, M. S. (2020). Malaysian ESL teachers' perception towards CEFR- aligned textbooks. International Journal of New Technology and Research. 6(10), 73-79. https://doi.org/10.31871/IJNTR.6.10.23.
Monihuldin, M. (2018, January 14). Discussion on the use of foreign English textbooks in schools' sparks debate. IIUM Today. http://news.iium.edu.my/2018/01/14/discussion-on-use-offoreign-english-textbooks-in-schools-sparks-debate/.
Nehal, R. (2016). Materials adaptation in English Language Teaching: Implications for Teacher Development. YKing Press. https://www.researchgate.net/publication/332859663_Materials_Adaptation_in_English_Language_Teaching_Implications_for_Teacher_Development.
Norhana Abdullah & Chandran, S. K. (2009). Cultural elements in a Malaysian English language. USIM Research Repository. https://oarep.usim.edu.my/jspui/handle/123456789/11564.
Nguyen, V. H., & Hamid, M. O. (2015). Educational policy borrowing in a globalized world: A case study of Common European Framework of Reference for Languages in a Vietnamese university. Journal of English Teaching, Practice & Critique, 14(1), 60-74. https://doi.org/10.1108/ETPC-02-2015-0014.
Nurul Ain Johar & Azlina Abdul Aziz. (2019). Teachers' perceptions on using the Pulse 2 textbook. Journal of Educational Research and Indigenous Studies,2(1), 2-15. Research Gate. https://www.researchgate.net/publication/339458225_Teachers'_Perceptions_on_Using_the_Pulse_2_textbook.
Rahim, H. A., & Daghigh, A. J. (2019). Locally developed versus global textbooks: An evaluation of cultural content in textbooks used in English language teaching in Malaysia. Asian Englishes. https://doi.org/10.1080/13488678.2019.1669301.