Veloo, Arsaythamby, and Rosna Awang Hashim. “Kesahan Dan Kebolehpercayaan Alat Ukur Orientasi Pembelajaran Matematik (OPM)”. International Journal of Management Studies 16, no. 1 (June 30, 2009): 57–73. Accessed May 6, 2024. https://e-journal.uum.edu.my/index.php/ijms/article/view/9957.