Khair Bin Shafie, Pahwazull, et al. “The Development of a Patterned Topical Teaching and Learning Module (ToPo) and Its Effect on Form 4 Students’ Achievement on the Topic of the Probability of the Combined Event”. International Journal of Academic Research in Progressive Education and Development, vol. 12, no. 1, Jan. 2023, https://ijarped.com/index.php/journal/article/view/1415.