Sinaga, Ferry Indra Sakti. “Hypothetical Learning Trajectory Based on Ethnomathematics”. NUSRA : Jurnal Penelitian dan Ilmu Pendidikan 5, no. 1 (February 27, 2024): 333–341. Accessed November 23, 2024. https://ejournal.nusantaraglobal.or.id/index.php/nusra/article/view/2230.