World Tourism Organization. (1977). Promotion of intraregional tourism. World Tourism Organization.
Chicago Style (17th ed.) CitationWorld Tourism Organization. Promotion of Intraregional Tourism. Madrid: World Tourism Organization, 1977.
MLA (9th ed.) CitationWorld Tourism Organization. Promotion of Intraregional Tourism. World Tourism Organization, 1977.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.