Avisca KCW, Mawardi M, Astuti S. PENINGKATAN CRITICAL THINKING DAN COLLABORATIVE SKILL MATEMATIKA MELALUI MODEL GROUP INVESTIGATION BERBANTUAN MAGIC BALL. NL [Internet]. 2018 Apr. 23 [cited 2024 Aug. 3];2(2):129-38. Available from: https://journal.umtas.ac.id/index.php/naturalistic/article/view/204