Kareem, Omar Abdull, Tai Mei Kin, Khalip bin Musa, and Arsalan Mujahid Ghouri. 2019. “Professional Learning Communities in Peninsular Malaysia: Comparing Day Secondary School and National Religious Secondary School”. International Journal of Academic Research in Progressive Education and Development 8 (2). https://ijarped.com/index.php/journal/article/view/2538.