APA (7th ed.) Zitazioa

Fennell, D. A. (2020). Ecotourism (Fifth edition.). Routledge.

Chicago Style (17th ed.) Zitazioa

Fennell, David A. Ecotourism. Fifth edition. London, UK ; New York, USA: Routledge, 2020.

MLA (9th ed.) Zitazioa

Fennell, David A. Ecotourism. Fifth edition. Routledge, 2020.