APA aipamena

(2006). Ecotourism planning and management. Sonali.

Chicago Style aipamena

Ecotourism Planning and Management. NewDelhi: Sonali, 2006.

MLA aipamena

Ecotourism Planning and Management. Sonali, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.