APA (7th ed.) Citation

Barbour, B. H. (2001). Fort Union and the upper Missouri fur trade. University of Oklahoma Press.

Chicago Style (17th ed.) Citation

Barbour, Barton H. Fort Union and the Upper Missouri Fur Trade. Norman: University of Oklahoma Press, 2001.

MLA (9th ed.) Citation

Barbour, Barton H. Fort Union and the Upper Missouri Fur Trade. University of Oklahoma Press, 2001.