Sugiarni R, Alghifari E, Ifanda AR. MENINGKATKAN KEMAMPUAN SPASIAL MATEMATIS SISWA DENGAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING BERBANTUAN GEOGEBRA. KJPM [Internet]. 2018Apr.2 [cited 2024May19];3(1):93-102. Available from: https://www.kalamatika.matematika-uhamka.com/index.php/kmk/article/view/64