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.
芝加哥风格引文Philippines Bureau of Tourism Services 与 Philippines. Rules and Regulations Governing the Business of Travel and Tour Agencies, Travel Representatives and Tour Guides. Manila: The Bureau, 1979.
MLA引文Philippines Bureau of Tourism Services 与 Philippines. Rules and Regulations Governing the Business of Travel and Tour Agencies, Travel Representatives and Tour Guides. The Bureau, 1979.
警告：这些引文格式不一定是100％准确.