Che Ahmad, C. N., A. Yahya, M. F. N. Lee Abdullah, N. Mohamed Noh, M. Adnan, and N. J. Amri. “CONSTRUCTION AND VERIFICATION OF ENVIRONMENTAL ASSESSMENT INSTRUMENTS PHYSICAL SCIENCE CLASSROOM (IPPFBDS) (14 - 26)”. Jurnal Pendidikan Sains Dan Matematik Malaysia, Vol. 4, no. 2, Apr. 2019, pp. 14-26, https://ejournal.upsi.edu.my/index.php/JPSMM/article/view/2131.