Federal Writers' Project. (1939). The Oregon Trail: The Missouri river to the Pacific ocean. Hastings House.
Style de citation Chicago (17e éd.)Federal Writers' Project. The Oregon Trail: The Missouri River to the Pacific Ocean. New York: Hastings House, 1939.
Style de citation MLA (8e éd.)Federal Writers' Project. The Oregon Trail: The Missouri River to the Pacific Ocean. Hastings House, 1939.
Attention : ces citations peuvent ne pas être correctes à 100%.