Bontong, A., M. Betaubun, K. Lieung, and H. Walten. “Improving Mathematics Learning Outcomes of Elementary School Students With the Direct Learning Method (An Experimental Study in South Papua)”. Edumaspul: Jurnal Pendidikan, Vol. 7, no. 1, Mar. 2023, pp. 1575-8, doi:10.33487/edumaspul.v7i1.6301.