Situmorang, Toho Fervin Marulitua, Friscilla Wulan Tersta, Robin Pratama, and Robi Hendra. “Determinants of Reading Literacy and Numeracy in Indonesian Community Learning Centers (PKBM): A Systematic Literature Review”. Varied Knowledge Journal 4, no. 1 (August 30, 2026): 1318–1340. Accessed September 19, 2026. https://journal.globalcendekia.or.id/index.php/vkj/article/view/314.