Bharatdwaj, B. (2006). Physical geography: Introduction to earth. Discovery.
Chicago Style aipamenaBharatdwaj, B. Physical Geography: Introduction to Earth. New Delhi: Discovery, 2006.
MLA aipamenaBharatdwaj, B. Physical Geography: Introduction to Earth. Discovery, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.