Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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