Noviani, Endah Tri, Erik Aditia Ismaya, and Khamdun. “Development of IPAS Learning Modules Based on Problem-Based Learning on Ecosystem Material for Elementary School Students”. Asian Journal of Assessment in Teaching and Learning 13, no. 1 (June 30, 2023): 71–81. Accessed July 27, 2024. https://ejournal.upsi.edu.my/index.php/AJATeL/article/view/9872.