Çakıcıoğlu Oban, R., and H. A. Gökçe Gündüzoğlu. “The Perception of Local People about the Tourism Potential in Ulubey Canyon (Usak Province)”. Journal of Human Sciences, vol. 14, no. 2, June 2017, pp. 2078-89, https://www.j-humansciences.com/ojs/index.php/IJHS/article/view/4615.