Hoff and Overgaard & World Tourism Organization. (1992). Tourism master plan for the Philippines. World Tourism Organization.
Čikaški stil citiranja (17. izdanje)Hoff and Overgaard i World Tourism Organization. Tourism Master Plan for the Philippines. [Madridn]: World Tourism Organization, 1992.
MLA način citiranja (9. izdanje)Hoff and Overgaard i World Tourism Organization. Tourism Master Plan for the Philippines. World Tourism Organization, 1992.
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