Philippines Department of Tourism Bureau of Special Services & Philippines. (1992). Rules and regulations governing the accreditation of tourism-related establishments. Bureau of Special Services, Department of Tourism.
Chicago-referens (17:e uppl.)Philippines Department of Tourism Bureau of Special Services och Philippines. Rules and Regulations Governing the Accreditation of Tourism-related Establishments. [Manila]: Bureau of Special Services, Department of Tourism, 1992.
MLA-referens (9:e uppl.)Philippines Department of Tourism Bureau of Special Services och Philippines. Rules and Regulations Governing the Accreditation of Tourism-related Establishments. Bureau of Special Services, Department of Tourism, 1992.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.