Tarapraing, Angelika, Ferdinand Tampubolon, Stefani Sinaga, en Tanti Listiani. ‘SEJARAH DAN REFLEKSI KRISTIANI ATAS PERKEMBANGAN SISTEM BILANGAN DALAM BERBAGAI PERADABAN KUNO [HISTORY AND CHRISTIAN REFLECTION ON THE DEVELOPMENT OF NUMERAL SYSTEMS IN VARIOUS ANCIENT CIVILIZATIONS]’. JOHME: Journal of Holistic Mathematics Education 9, no. 2 (december 3, 2025): 287–293. Geraadpleegd november 14, 2026. https://ojs.uph.edu/index.php/JOHME/article/view/10213.