BORBORAN, ARIANNE, Mariel Africa, Mary-Ann Guilleno, Anne Jeannette C. Pamplona, Jennifer Torrefranca, and Levi E. Elipane. “Stimulating Understanding of Properties of Quadrilaterals Using Van Hiele’s Model: A Lesson Study”. Journal of Mathematics and Statistics Studies 2, no. 1 (March 19, 2021): 21–25. Accessed December 3, 2023. https://al-kindipublisher.com/index.php/jmss/article/view/1402.