Salapuddin, Noh A. “Modular Learning Modality: Effects on the Mathematics Achievement of Grade-10 Students in MSU-Sulu Laboratory High School”. International Journal of Research in Engineering, Science and Management, vol. 4, no. 10, Oct. 2021, pp. 49-52, https://journal.ijresm.com/index.php/ijresm/article/view/1425.