APA (7th ed.) Citation
Orvin, A. K., & Horn, G. (1928). Geology of Bear Island.
Chicago Style (17th ed.) Citation
Orvin, Anders K., and Gunnar Horn. Geology of Bear Island. Oslo, 1928.
MLA (9th ed.) Citation
Orvin, Anders K., and Gunnar Horn. Geology of Bear Island. 1928.
Warning: These citations may not always be 100% accurate.