A. . M. S. Putri, M. . P. Mahindra, M. . T. A. Sampurna, R. . A. Aryananda, and F. . K. Khotimah, “Effectiveness of Participation in Pregnancy Classes to Reduce the Incidence of Obstetric Labor Complications and Cesarean Section”, Indones J Obstet Gynecol, vol. 10, no. 4, pp. 229–234, Oct. 2022.