World Tourism Organization. (2000). Data collection and analysis for tourism manangement, marketing and planning: A manual for managers and analysts. Word Tourism Organization.
Παραπομπή σε μορφή Chicago (17η εκδ.)World Tourism Organization. Data Collection and Analysis for Tourism Manangement, Marketing and Planning: A Manual for Managers and Analysts. Madrid: Word Tourism Organization, 2000.
Παραπομπή σε μορφή MLA (8th εκδ.)World Tourism Organization. Data Collection and Analysis for Tourism Manangement, Marketing and Planning: A Manual for Managers and Analysts. Word Tourism Organization, 2000.
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