APA aipamena

Verma, G. (2008). Ecotourism and development in the new millenium. Mahadev.

Chicago Style aipamena

Verma, Geeta. Ecotourism and Development in the New Millenium. Mahadev, 2008.

MLA aipamena

Verma, Geeta. Ecotourism and Development in the New Millenium. Mahadev, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.