Safitri, I. and Endarini, E. 2020. Efektivitas Model Problem Based Learning dan Problem Posing terhadap Kemampuan Pemecahan Masalah di Sekolah Dasar. Jurnal Basicedu. 4, 2 (Apr. 2020), 412–418. DOI:https://doi.org/10.31004/basicedu.v4i2.366.