Hulbert, A. B. (1930). 1830-1930, the Oregon trail centennial: The documentary background of the days of the first wagon train on the road to Oregon.. State University of Montana.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHulbert, Archer Butler. 1830-1930, the Oregon Trail Centennial: The Documentary Background of the Days of the First Wagon Train on the Road to Oregon.. Missoula: State University of Montana, 1930.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHulbert, Archer Butler. 1830-1930, the Oregon Trail Centennial: The Documentary Background of the Days of the First Wagon Train on the Road to Oregon.. State University of Montana, 1930.
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