(1975). Northern sea route, 1974. Polar Record, 17(110), 550.
Chicago Style (17th ed.) Citation"Northern Sea Route, 1974." Polar Record 17, no. 110 (1975): 550.
MLA (9th ed.) Citation"Northern Sea Route, 1974." Polar Record, vol. 17, no. 110, 1975, p. 550.
Warning: These citations may not always be 100% accurate.