APA aipamena

Fennell, D. A. (2008). Ecotourism (3rd ed.).

Chicago Style aipamena

Fennell, David; Author. Ecotourism. 3rd ed. New York, Routledge, 2008.

MLA aipamena

Fennell, David; Author. Ecotourism. 3rd ed. 2008.