Darmayanti, N.P.D, I.W. Wiarta, and G.N.S. Agustika. “Pengaruh Model Pembelajaran STAD Berbasis Portofolio Terhadap Kompetensi Pengetahuan Matematika”. International Journal of Elementary Education 2, no. 3 (November 1, 2018): 228–236. Accessed February 23, 2025. https://ejournal.undiksha.ac.id/index.php/IJEE/article/view/15962.