APA aipamena

Bharatdwaj, B. (2006). Physical geography: Introduction to earth. Discovery.

Chicago Style aipamena

Bharatdwaj, B. Physical Geography: Introduction to Earth. New Delhi: Discovery, 2006.

MLA aipamena

Bharatdwaj, B. Physical Geography: Introduction to Earth. Discovery, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.