HAPENCIUC, Cristian Valentin, et al. “INTEGRATION OF THE SAP CONCEPT IN THE EMPLOYEE ASSESSMENT OF TRAVEL AGENCIES IN SUCEAVA COUNTY THROUGH MYSTERY SHOPPING TYPE METHODS”. Revista De Turism - Studii și cercetări în Turism, no. 17, June 2014, pp. 22-29, https://revistadeturism.ro/index.php/rdt/article/view/473.