Dewi, G.A.T. and Hendrati, L.Y. 2016. Breast Cancer Risk Analysis by the Use of Hormonal Contraceptives and Age of Menarche. Jurnal Berkala Epidemiologi. 3, 1 (Jan. 2016), 12–23. DOI:https://doi.org/10.20473/jbe.V3I12015.12-23.