Cita APA (7a ed.)

Fennell, D. A. (2003). Ecotourism: An introduction (2nd ed.). Routledge.

Cita Chicago Style (17a ed.)

Fennell, David A. Ecotourism: An Introduction. 2nd ed. London ; New York: Routledge, 2003.

Cita MLA (9a ed.)

Fennell, David A. Ecotourism: An Introduction. 2nd ed. Routledge, 2003.