Martini, Susi. “Landasan Filsafat Konstruktivisme Dalam Pembelajaran Sains”. Jurnal Mangifera Edu 1, no. 2 (January 31, 2017): 35-45. Accessed October 28, 2020. https://jurnal.biounwir.ac.id/index.php/mangiferaedu/article/view/80.