Manurung, Jonson Manurung. “Puzzle Game With a Combination of Forward Chaining and Backward Chaining Methods”. Jurnal Info Sains : Informatika dan Sains 10, no. 1 (March 1, 2020): 13–18. Accessed May 6, 2026. https://ejournal.seaninstitute.or.id/index.php/InfoSains/article/view/27.