Node Siregar, Nova Sontry, Helprida Sihite, and Mayes Felda Simamora. “Developing Healthy Food for Toddlers Based on Local Purple Sweet Potato Food ”. Science Midwifery 13, no. 4 (October 30, 2025): 1214–1223. Accessed August 24, 2026. https://midwifery.iocspublisher.org/index.php/midwifery/article/view/2136.