APA (7th ed.) Citation

Federal Writers' Project. (1939). The Oregon Trail: The Missouri river to the Pacific ocean. Hastings House.

Chicago Style (17th ed.) Citation

Federal Writers' Project. The Oregon Trail: The Missouri River to the Pacific Ocean. New York: Hastings House, 1939.

MLA (8th ed.) Citation

Federal Writers' Project. The Oregon Trail: The Missouri River to the Pacific Ocean. Hastings House, 1939.

Warning: These citations may not always be 100% accurate.