D. M. R. Riyanto and S. P. Kawuryan, “Development of Natural and Social Science (IPAS) E-Modules Based on Project Based Learning to Improve The Collaboration Ability of Elementary School Students”, j. kependidikan. has. penelit. kaji. kepustakaan. bid. pendidik. pengajaran. n.a., vol. 11, no. 1, pp. 237–247, Mar. 2025.