Federal Writers' Project. (1939). The Oregon trail: The Missouri river to the Pacific ocean. Hastings house.
Chicagoスタイル(17版)引用形式Federal Writers' Project. The Oregon Trail: The Missouri River to the Pacific Ocean. New York: Hastings house, 1939.
MLA(9版)引用形式Federal Writers' Project. The Oregon Trail: The Missouri River to the Pacific Ocean. Hastings house, 1939.
警告: この引用は必ずしも正確ではありません.