APA (7th ed.) Citation

Bertram, G. C. L. (1945). The Arctic and Antarctic Circles. Polar Record, 4(30), 279.

Chicago Style (17th ed.) Citation

Bertram, G. C. L. "The Arctic and Antarctic Circles." Polar Record 4, no. 30 (1945): 279.

MLA (9th ed.) Citation

Bertram, G. C. L. "The Arctic and Antarctic Circles." Polar Record, vol. 4, no. 30, 1945, p. 279.