APA (7th ed.) Citation

Greenbie, S. (1929). Frontiers and the fur trade. The John Day company.

Chicago Style (17th ed.) Citation

Greenbie, Sydney. Frontiers and the Fur Trade. New York: The John Day company, 1929.

MLA (9th ed.) Citation

Greenbie, Sydney. Frontiers and the Fur Trade. The John Day company, 1929.