TANDAS, Joseph Balinag. Development of a Valid and Reliable Summative Test in Plane Trigonometry. Journal of Science and Mathematics Letters, [S. l.], v. 9, n. 1, p. 46–59, 2021. DOI: 10.37134/jsml.vol9.1.5.2021. Disponível em: https://ejournal.upsi.edu.my/index.php/JSML/article/view/4117. Acesso em: 13 may. 2025.