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.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Philippines Department of Tourism Bureau of Special Services và Philippines. Rules and Regulations to Govern the Accreditation of Travel and Tour Services. [Manila]: Bureau of Special Services, Department of Tourism, 1992.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)Philippines Department of Tourism Bureau of Special Services và Philippines. Rules and Regulations to Govern the Accreditation of Travel and Tour Services. Bureau of Special Services, Department of Tourism, 1992.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.