S. N. Sinaga, A. Siagian, N. Nurmaini, and B. Badaruddin, “The Increase of Knowledge, Attitude, and Practice of Husbands toward the Prenatal Care of their Wives Using the Illustrations Having the Local Cultural Nuance”, Open Access Maced J Med Sci, vol. 10, no. E, pp. 525–530, Apr. 2022.