D. . S, E. P. . Siregar, H. S. . Siagian, and A. S. . Kalira, “Effectiveness Of Pisbro Cookies In Improving Hemoglobin Levels Among Pregnant Women: A Quasi-Experimental Study”, J. App Nurs n Health, vol. 7, no. 3, pp. 836–851, Nov. 2025.