M. Mat Amin, J. Yep Ai Lan, M. Makhtar, and A. Rasid Mamat, “A Decision Tree Based Recommender System for Backpackers Accommodations”, IJET, vol. 7, no. 2.15, pp. 45–48, Apr. 2018, doi: 10.14419/ijet.v7i2.15.11210.