Manurung, Lastri Wahyuni, Nurhayati Sitorus, Marnala Pangaribuan, Carolina Pakpahan, Christina Natalina Saragi, Kammer Tuahman Sipayung, Fenty Debora Napitupulu, and Martin Maděra. “Exposing Literacy in SD and SMP Swasta HKBP Sidorame Medan”. Indonesia Berdaya 3, no. 4 (September 25, 2022): 1073–1078. Accessed July 24, 2026. https://www.ukinstitute.org/journals/ib/article/view/3442.