Rusli, Roselinda, Nelly Puspandari, and Vivi Setiawaty. 2015. “The Correlation Between Educational Level and Incidence of Syphilis Among Female Sex Workers Within 7 Cities in Indonesia in 2007”. International Journal of Medical and Health Sciences Research 2 (8):141-49. https://doi.org/10.18488/journal.9/2015.2.8/9.8.141.149.