Lasmawanti, Sri, and Veronica Anggreni Damanik. “Factors Related to Giving Formula Milk to Infants 0-6 Months in Pangurabaan Village, Sipirok District, South Tapanuli Regency in 2020”. Science Midwifery 9, no. 2 (April 29, 2021): 394–402. Accessed May 29, 2026. https://midwifery.iocspublisher.org/index.php/midwifery/article/view/119.