Sulistyowati Y, Sugiman S. Pengembangan Perangkat Pembelajaran Bangun Ruang di SMP dengan Pendekatan Creative Problem Solving. Pythagoras [Internet]. 2014 Dec. 10 [cited 2025 Jul. 13];9(2):219-32. Available from: https://journal.uny.ac.id/index.php/pythagoras/article/view/9082