Fatchurrohmah A, Sarwi S, Utsman U. Pengaruh Problem Based Learning Melalui Demonstrasi dan Diskusi terhadap Kemampuan Verbal. JPE [Internet]. 11Sep.2017 [cited 23May2024];6(2):140-6. Available from: https://journal.unnes.ac.id/sju/jpe/article/view/17567