Peen, Tan Yin, and Mohammad Yusof Arshad. “COLLABORATIVE AND SELF-DIRECTED LEARNING PROCESSES: A CASE STUDY IN MALAYSIAN CHEMISTRY PBL LESSON”. IJER - INDONESIAN JOURNAL OF EDUCATIONAL REVIEW 4, no. 1 (July 3, 2017): 1 - 13. Accessed April 21, 2025. http://103.8.12.212:33180/unj/index.php/ijer/article/view/4232.