APA (7th ed.) Citation

Nissen, B. A. (1957). Gunnar Knudsen. Aschehoug.

Chicago Style (17th ed.) Citation

Nissen, Bernt A. Gunnar Knudsen. Oslo: Aschehoug, 1957.

MLA (9th ed.) Citation

Nissen, Bernt A. Gunnar Knudsen. Aschehoug, 1957.

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