NINGSIH SAGALA, P. .; SUHENDRO L, P. .; WIDYASTUTI, E. . Development Of First High School Mathematics LKPD Based On Case Method Integrated Local Culture Mandailing Tribe. International Journal of Educational Research & Social Sciences , [S. l.], v. 3, n. 4, p. 1734–1743, 2022. DOI: 10.51601/ijersc.v3i4.463. Disponível em: https://ijersc.org/index.php/go/article/view/463. Acesso em: 14 jun. 2025.