Zam-Zam, S. ., D. . Chandra, F. N. . Andriani, I. B. . Afita, and P. . Rosyani. “Perbandingan Metode Forward Chaining Dan Backward Chaining Untuk Mendiagnosa Covid-19”. Scientia Sacra: Jurnal Sains, Teknologi Dan Masyarakat, vol. 1, no. 1, June 2021, pp. 23-26, http://www.pijarpemikiran.com/index.php/Scientia/article/view/9.