APA (7th ed.) Citation

Christophersen, B. (1972). 9. april 1940: Krigen i Norge 1940.

Chicago Style (17th ed.) Citation

Christophersen, Bjørn. 9. April 1940: Krigen I Norge 1940. Oslo [u.a.], 1972.

MLA (8th ed.) Citation

Christophersen, Bjørn. 9. April 1940: Krigen I Norge 1940. 1972.

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