APA (7th ed.) Citation

Friend, P. F. (1969). Cambridge Greenland Expedition, 1968. Polar Record, 14(91), 494.

Chicago Style (17th ed.) Citation

Friend, P. F. "Cambridge Greenland Expedition, 1968." Polar Record 14, no. 91 (1969): 494.

MLA (9th ed.) Citation

Friend, P. F. "Cambridge Greenland Expedition, 1968." Polar Record, vol. 14, no. 91, 1969, p. 494.

Warning: These citations may not always be 100% accurate.