Hoff og Overgaard, World Tourism Organization, United Nations Development Programme, & Philippines, Department of Tourism. Tourism development standards and guidelines. Department Tourism.
Chicago Style (17th ed.) CitationHoff og Overgaard, World Tourism Organization, United Nations Development Programme, and Department of Tourism Philippines. Tourism Development Standards and Guidelines. Manila: Department Tourism.
MLA (9th ed.) CitationHoff og Overgaard, et al. Tourism Development Standards and Guidelines. Department Tourism.
Warning: These citations may not always be 100% accurate.