Alam, Muhammad Syahrul, Wiwiek Hidayati Jaya, and Muhammad Iqbal. “Relationship Between Maternal Age and the Incidence of Preterm Birth in Hospitals”. An Idea Health Journal 4, no. 01 (February 20, 2024): 39–45. Accessed November 16, 2024. http://ihj.ideajournal.id/index.php/IHJ/article/view/428.