(1976). Planning and development of the tourist industry in the ECE region: Proceedings of the Symposium on the Planning and Development of the Tourist Industry in the ECE region held under the auspices of the ECE at Dubrovnik (Yogoslavia), 13-18 October 1975. New York: United Nations.
Παραπομπή Chicago StylePlanning and Development of the Tourist Industry in the ECE Region: Proceedings of the Symposium On the Planning and Development of the Tourist Industry in the ECE Region Held Under the Auspices of the ECE At Dubrovnik (Yogoslavia), 13-18 October 1975. New York: United Nations, 1976.
Παραπομπή MLAPlanning and Development of the Tourist Industry in the ECE Region: Proceedings of the Symposium On the Planning and Development of the Tourist Industry in the ECE Region Held Under the Auspices of the ECE At Dubrovnik (Yogoslavia), 13-18 October 1975. New York: United Nations, 1976.