Sianipar, S.N.S.D.M., Hutahaean, J. and Dewi, M. 2022. THE EARLY DETECTION OF RESPIRATORY SYSTEM DISEASES BY USING THE CERTAINTY FACTOR METHOD. Jurnal Teknik Informatika (Jutif). 3, 3 (Jun. 2022), 619-630. DOI:https://doi.org/10.20884/1.jutif.2022.3.3.249.