APA (7th ed.) Citation

Curle, A. O., Olsen, M., & Shetelig, H. (1954). Civilisation of the Viking settlers in relation to their old and new countries. Aschehoug.

Chicago Style (17th ed.) Citation

Curle, Alexander O., Magnus Olsen, and Haakon Shetelig. Civilisation of the Viking Settlers in Relation to Their Old and New Countries. Oslo: Aschehoug, 1954.

MLA (9th ed.) Citation

Curle, Alexander O., et al. Civilisation of the Viking Settlers in Relation to Their Old and New Countries. Aschehoug, 1954.