Christianti, Md Rai Advina. “PENGARUH MODEL PEMBELAJARAN DISCOVERY LEARNING BERBASIS PENILAIAN PORTOFOLIO TERHADAP KOMPETENSI PENGETAHUAN MATEMATIKA SISWA KELAS IV”. Indonesian Journal of Educational Research and Review 1, no. 2 (July 20, 2018). Accessed April 4, 2025. https://ejournal.undiksha.ac.id./index.php/IJERR/article/view/14707.