Oktarina C, Zainul R. Analysis of the Need Development of E-Content Based on Problem Based Learning (PBL) using Moodle on Basic Chemical Law Material. PAKAR [Internet]. 3Feb.2024 [cited 9May2024];22(1):233-44. Available from: http://pakar.pkm.unp.ac.id/index.php/pakar/article/view/552