APA (7th ed.) Citation

Orvin, A. K., & Horn, G. (1940). Outline of the geological history of Spitsbergen.: With 1 geological map, 3 plates, and 12 text-figures. I kommisjon hos J. Dybwad.

Chicago Style (17th ed.) Citation

Orvin, Anders Kristian, and Gunnar Horn. Outline of the Geological History of Spitsbergen.: With 1 Geological Map, 3 Plates, and 12 Text-figures. Oslo: I kommisjon hos J. Dybwad, 1940.

MLA (9th ed.) Citation

Orvin, Anders Kristian, and Gunnar Horn. Outline of the Geological History of Spitsbergen.: With 1 Geological Map, 3 Plates, and 12 Text-figures. I kommisjon hos J. Dybwad, 1940.