1. World Health Organization “Orientation programme on adolescent health for health-care providers. Department of child and adolescent health and development (CAH) World Health Organization”, (2006), Handout New Modules.
2. Kementerian Kesehatan Republik Indonesia (2019), “Data dan informasi profil kesehatan Indonesia 2018”. Pusat data dan informasi Kementerian Kesehatan”. Available at: https://pusdatin.kemkes.go.id/resources/download/pusdatin/profil-kesehatan-indonesia/PROFIL_KESEHATAN_2018_1.pdf (accessed 27 November 2019)
3. D. K. Thiyagarajan, H. Basit, R. Jeanmonod, “Physiology, menstrual cycle”, in StatPearls [Internet]. Treasure Island (FL): (2019), StatPearls Publishing. Available at: https://www.ncbi.nlm.nih.gov/books/NBK500020/ (accessed 08 November 2019).
4. J. Rosner, T. Samardzic, M. S. Sarao. “Physiology, female reproduction”, in StatPearls [Internet]. (StatPearls Publishing, 2020).
5. C. J. Petry, K. K. Ong, I. A. Hughes, C. L. Acerini, D. B. Dunger. “Age at menarche and blood pressure in pregnancy”. PubMed. Pregnancy Hypertens. Jan; 15:134–140 (2019).