Toe, Nesya, Jovialine Rungkat, and Milan Rogahang. “Pengembangan E-Modul Berbasis Model Problem Based Learning Dalam Pembelajaran IPA Pada Materi Pencemaran Lingkungan Di SMP Negeri 3 Tondano”. SOSCIED 6, no. 1 (July 18, 2023): 198-209. Accessed August 31, 2025. https://poltekstpaul.ac.id/jurnal/index.php/jsoscied/article/view/622.