J. O. M. G. Salvado, A. M. A. P. Ferreira, and C. M. M. Costa, “CO-CREATION: THE TRAVEL AGENCIES’ NEW FRONTIER”, Tour Manage Stud, pp. 229–244, Jan. 2012, Accessed: Apr. 27, 2024. [Online]. Available: https://www.tmstudies.net/index.php/ectms/article/view/191