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-viite (17. p.)Philippines Department of Tourism Bureau of Special Services ja Philippines. Rules and Regulations Governing the Accreditation of Tourism-related Establishments. [Manila]: Bureau of Special Services, Department of Tourism, 1992.
MLA-viite (9. p.)Philippines Department of Tourism Bureau of Special Services ja Philippines. Rules and Regulations Governing the Accreditation of Tourism-related Establishments. Bureau of Special Services, Department of Tourism, 1992.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.