Indraswari, Ratih. “Characteristics of Indonesian Adolescents Who Had Experienced Pregnancy Under the Age of 20 Years: Basic Health Research 2018”. Jurnal Promkes: The Indonesian Journal of Health Promotion and Health Education 9, no. 2 (September 23, 2021): 159–167. Accessed September 11, 2024. https://e-journal.unair.ac.id/PROMKES/article/view/25631.