Purnawan, Dania, Jhonson Hutagalung, and Sri Azmi. “Penerapan Metode Certainty Factor Dalam Mendiagnosa Penyakit Kehamilan Berbasis Web”. Building of Informatics, Technology and Science (BITS) 4, no. 2 (September 22, 2022): 614-623. Accessed August 25, 2026. https://ejurnal.seminar-id.com/index.php/bits/article/view/2039.