APA (7th ed.) Citation

Kjær, K. (2006). The polar ship Frithjof. Polar Record, 42(4), 281.

Chicago Style (17th ed.) Citation

Kjær, Kjell-G. "The Polar Ship Frithjof." Polar Record 42, no. 4 (2006): 281.

MLA (9th ed.) Citation

Kjær, Kjell-G. "The Polar Ship Frithjof." Polar Record, vol. 42, no. 4, 2006, p. 281.