lestari indah rahmi, Yurnetti Y. DEVELOPMENT OF PROBLEM BASED LEARNING MODULES ON ADDITIVES AND ADDICTIVE SUBSTANCES FOR ODD SEMESTER GRADE VIII SMP. universe [Internet]. 2022 Jul. 31 [cited 2026 Apr. 19];3(1):104-13. Available from: http://universe.ppj.unp.ac.id/index.php/universe/article/view/200