Buhalis, D., Tjoa, A. M., & Jafari, J. Information and communication technologies in tourism 1998: Proceedings of the internaional conference in İstanbul, Turkey,1998.

Buhalis, Dimitrios, A Min Tjoa, and Jafar Jafari. Information and Communication Technologies in Tourism 1998: Proceedings of the Internaional Conference in İstanbul, Turkey,1998.

Buhalis, Dimitrios, A Min Tjoa, and Jafar Jafari. Information and Communication Technologies in Tourism 1998: Proceedings of the Internaional Conference in İstanbul, Turkey,1998.