Surbakti , J., and A. R. Kardian. “Sistem Pakar Kejiwaan Dengan Forward Chaining Berbasis WEB”. Jurnal Ilmiah Komputasi, vol. 15, no. 1, June 2016, pp. 23-34, https://ejournal.jak-stik.ac.id/index.php/komputasi/article/view/141.