KOMBINASI METODE BACKWARD CHAINING DAN CERTAINTY FACTOR MENDIAGNOSA PENYAKIT GANGGUAN ANSIETAS. JSSR [Internet]. 2023 Oct. 13 [cited 2026 Aug. 4];6(3):657-62. Available from: https://goretanpena.com/jurnal/index.php/JSSR/article/view/1469