Siregar, Eka, Arni Amir, and Nuzulia Irawati. “Ideal Dietary Intakes of Vitamin B12 and Vitamin E Prevent Anemia During Pregnancy”. jitek 11, no. 2 (March 30, 2024): 231-243. Accessed November 7, 2026. https://www.poltekkesjakarta3.ac.id/ejurnalnew/index.php/jitek/article/view/1195.