Baird, . P. D. (1964). The Polar World. Longmans.
Chicago Style (17th ed.) ZitazioaBaird, Patrick D. The Polar World. London: Longmans, 1964.
MLA (9th ed.) ZitazioaBaird, Patrick D. The Polar World. Longmans, 1964.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.