Bontong, Adrianus, Martha Betaubun, Karlina Lieung, and Hendrika Walten. “Improving Mathematics Learning Outcomes of Elementary School Students With the Direct Learning Method (An Experimental Study in South Papua)”. Edumaspul: Jurnal Pendidikan 7, no. 1 (March 1, 2023): 1575-1585. Accessed May 19, 2024. https://ummaspul.e-journal.id/maspuljr/article/view/6301.