Imau, Valentino, Rosniza Che Rose, and Norela Sulaiman. 2018. “Penilaian Kepuasan Pelancong Terhadap Ekopelancongan Di Bukit Fraser Menggunakan Model Importance-Performance Analysis (IPA)”. GEOGRAFI 6 (2), 29 - 41. https://ejournal.upsi.edu.my/index.php/GEOG/article/view/2086.