Ratna Derwi Puspita Sari, et al. “Analysis of the Relationship Between Adolescent Pregnancy and the Incidence of Preterm Labor at Kalirejo Health Center, Katon District, Pesawaran Regency”. Kurdish Studies, vol. 11, no. 2, Dec. 2023, pp. 5582-8, https://kurdishstudies.net/menu-script/index.php/KS/article/view/1099.