Essie Octiara, and Grace Anastasia Tarigan. “Mother’s Knowledge Regarding the Functions of Children’s Primary Teeth in Salapian District, Langkat-North Sumatera”. Dentika: Dental Journal 25, no. 2 (October 28, 2022): 54–61. Accessed August 18, 2025. https://idjpcr.usu.ac.id/dentika/article/view/8886.