Ramadayani, D., Yahfizam, dan S. Halimah. “PENGEMBANGAN LKPD BERBASIS PROBLEM BASED LEARNING”. Relevan : Jurnal Pendidikan Matematika, vol. 1, no. 1, Oktober 2021, hlm. 135-42, https://www.ejournal.yana.or.id/index.php/relevan/article/view/59.