Cieślik, Iwona, Ewa Cieślik, Agnieszka Siembida, and Małgorzata Tomczyk. 2013. “Evaluation of Services’ Quality in Upper Silesia Accommodation Facilities”. Journal of Agribusiness and Rural Development 30 (4), 21-36. http://www1.up.poznan.pl/jard/index.php/jard/article/view/664.