APA

Eagles P. F. J., McCool S. F., Haynes C. D., United Nations Environment Programme, World Tourism Organization & International Union for conservation of nature and natural resources. (2002). Sustainable tourism in protected areas. Gland, Switzerland: IUCN--the World Conservation Union.

Chicago

Eagles Paul F J, McCool Stephen F, Haynes Christopher D, United Nations Environment Programme, World Tourism Organization and International Union for conservation of nature and natural resources. 2002. Sustainable tourism in protected areas. Gland, Switzerland: IUCN--the World Conservation Union.

Harvard

Eagles P. F. J., McCool S. F., Haynes C. D., United Nations Environment Programme, World Tourism Organization and International Union for conservation of nature and natural resources. (2002). Sustainable tourism in protected areas. Gland, Switzerland: IUCN--the World Conservation Union.

MLA

Eagles Paul F J, McCool Stephen F, Haynes Christopher D, United Nations Environment Programme, World Tourism Organization and International Union for conservation of nature and natural resources. Sustainable tourism in protected areas. Gland, Switzerland: IUCN--the World Conservation Union. 2002.