Yaman, Maheran, Fadzidah Abdullah, Nur Fadhilah Rozali, and Farha Salim. 2018. “THE RELEVANCY OF OUTDOOR CLASSROOM FOR PBL APPROACH IN SELECTED UNIVERSITY IN KUALA LUMPUR”. PLANNING MALAYSIA 16 (6). https://journals.iium.edu.my/pmr/index.php/pmj/article/view/473.