Saspriyana, Kade Y., et al. “The Age, Education, and Occupation Characteristics Is Not Associated With Human Immunodeficiency Virus (HIV) Infection in Pregnant Mothers”. Indonesian Journal of Obstetrics and Gynecology, vol. 2, no. 2, Apr. 2014, pp. 65-68, doi:10.32771/inajog.v2i2.382.