Desi Natalia Br Sembiring, Mastiur Julianti B, Indah Yani Br. Tambunan, and Esther Siringo-ringo, “The Effectiveness of Iron Supplementation Combined with Vitamin C on Increasing Hemoglobin Levels Among Pregnant Women”, IJHS, vol. 6, no. 2, pp. 206–215, Jul. 2026.