Lambert, D. (1987). Polar regions. Wayland.
Cita Chicago (17th ed.)Lambert, David. Polar Regions. Wayland, 1987.
Cita MLA (9th ed.)Lambert, David. Polar Regions. Wayland, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)