Thiam Yew, Wun, and Sunita Binti Tajuddin. 2015. “Tahap Pencapaian Kemahiran Proses Sains Bersepadu Dalam Mata Pelajaran Sains Dalam Kalangan Pelajar Tingkatan Lima: The Level of Achievement on the Integrated Science Process Skills in Science Subject Among Form Five Students”. Journal of Science and Mathematics Letters 3 (December):7-14. https://ejournal.upsi.edu.my/index.php/JSML/article/view/377.