APA (7th ed.) Citation

Gjerset, K. (1915). History of the Norwegian people. Macmillan.

Chicago Style (17th ed.) Citation

Gjerset, Knut. History of the Norwegian People. New York: Macmillan, 1915.

MLA (9th ed.) Citation

Gjerset, Knut. History of the Norwegian People. Macmillan, 1915.