Gustri Wahyuni, Elyza, and Ricky Kurniawan. “Comparative Analysis of Veneral Diseases Diagnosed Using Tree and Certainty Factor Method”. International Journal of Engineering & Technology, vol. 7, no. 4.38, Dec. 2018, pp. 924-7, https://doi.org/10.14419/ijet.v7i4.38.27610.