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.
Παραπομπή σε μορφή Chicago (17η εκδ.)Philippines Department of Tourism Bureau of Special Services και Philippines. Rules and Regulations Governing the Accreditation of Tourism-related Establishments. [Manila]: Bureau of Special Services, Department of Tourism, 1992.
Παραπομπή σε μορφή MLA (9th εκδ.)Philippines Department of Tourism Bureau of Special Services και Philippines. Rules and Regulations Governing the Accreditation of Tourism-related Establishments. Bureau of Special Services, Department of Tourism, 1992.
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