Sari BTW, Kristin F. Efektivitas Penggunaan Model Problem Based Learning Dan Model Group Investigation Terhadap Kemampuan Kerjasama Siswa Sekolah Dasar. basicedu [Internet]. 2020 Mar. 27 [cited 2024 Jul. 22];4(2):257-6. Available from: https://jbasic.org/index.php/basicedu/article/view/357