Philippines Bureau of Tourism Services & Philippines. (1979). Rules and regulations governing the business of professional congress organizers. The Bureau.
Cita Chicago (17th ed.)Philippines Bureau of Tourism Services i Philippines. Rules and Regulations Governing the Business of Professional Congress Organizers. Manila: The Bureau, 1979.
Cita MLA (9th ed.)Philippines Bureau of Tourism Services i Philippines. Rules and Regulations Governing the Business of Professional Congress Organizers. The Bureau, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.