Londa , Treesje K, and Olivia J Lalamentik. “The Comparison Of Problem-Based Learning And Explicit Instruction Model For Maintaining Environmental Sustainability In Primary Schools Of Manado City”. Jurnal Ilmiah Desain Sains Arsitektur (DeSciArs) 1, no. 1 (November 12, 2020). Accessed April 20, 2025. https://ejurnal.unima.ac.id/index.php/desciars/article/view/417.