Hussain Othman, Abdullah Sulaiman, Berhannudin Mohd Salleh, and Syed Muhammad Dawilah al Edrus. PBL - PEMBANGUNAN KOMUNITI LESTARI. Penerbit UTHM, 2009. Accessed May 5, 2024. https://publisher.uthm.edu.my/omp/index.php/penerbituthm/catalog/book/52.