APA aipamena

Singh, R. (2004). National ecotourism & wildlife tourism. Kanishka publishers.

Chicago Style aipamena

Singh, Ratandeep. National Ecotourism & Wildlife Tourism. NewDelhi: Kanishka publishers, 2004.

MLA aipamena

Singh, Ratandeep. National Ecotourism & Wildlife Tourism. Kanishka publishers, 2004.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.