Mohd Noor N, Mohamed Arip MAS, Moh @ Hj Abdullah E, Yon H. Measuring the Content Validity of MEPI using Content Validity Ratio. J ICT Educ. 2019;3:81-88. Accessed December 5, 2025. https://ejournal.upsi.edu.my/index.php/JICTIE/article/view/2610