Philippines Department of Tourism Bureau of Special Services & Philippines. (1992). Rules and regulations to govern the accreditation of travel and tour services. Bureau of Special Services, Department of Tourism.
Citazione stile Chigago Style (17a edizione)Philippines Department of Tourism Bureau of Special Services e Philippines. Rules and Regulations to Govern the Accreditation of Travel and Tour Services. [Manila]: Bureau of Special Services, Department of Tourism, 1992.
Citatione MLA (9a ed.)Philippines Department of Tourism Bureau of Special Services e Philippines. Rules and Regulations to Govern the Accreditation of Travel and Tour Services. Bureau of Special Services, Department of Tourism, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.