Jane Wilda Irmawati Sirait. “Factors Affecting Mother in Breast Feeding in Sigumpar Village, Sigumpar District, Toba Regency”. International Journal of Public Health Excellence (IJPHE) 2, no. 2 (May 30, 2023): 584–589. Accessed May 9, 2024. https://ejournal.ipinternasional.com/index.php/ijphe/article/view/407.