M. H. Zain, M. S. Suhaimi, N. A. Mocktar, R. Razali, N. A. S. Azlan, and M. M. M. Zaki, “DEVELOPMENT AND DELPHI-BASED CONTENT VALIDATION OF A CHEMISTRY LEARNING QUESTIONNAIRE: EVIDENCE FROM STEM FOUNDATION STUDENTS’ PERCEPTIONS, ATTITUDES, INTEREST, AND LEARNING CHALLENGES”, IJMOE, vol. 8, no. 31, pp. 132–148, Sep. 2026.