Philippines Bureau of Tourism Services & Philippines. (1979). Rules and regulations governing the business of travel and tour agencies, travel representatives and tour guides. The Bureau.
Čikaški stil citiranja (17. izdanje)Philippines Bureau of Tourism Services i Philippines. Rules and Regulations Governing the Business of Travel and Tour Agencies, Travel Representatives and Tour Guides. Manila: The Bureau, 1979.
MLA način citiranja (9. izdanje)Philippines Bureau of Tourism Services i Philippines. Rules and Regulations Governing the Business of Travel and Tour Agencies, Travel Representatives and Tour Guides. The Bureau, 1979.
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