APA (7th ed.) Citation

Brown, W. E. (1936). Motor Tractors. Polar Record, 2(11), 90.

Chicago Style (17th ed.) Citation

Brown, W. E. "Motor Tractors." Polar Record 2, no. 11 (1936): 90.

MLA (9th ed.) Citation

Brown, W. E. "Motor Tractors." Polar Record, vol. 2, no. 11, 1936, p. 90.