Hulbert, A. B. (1933). Where rolls the Oregon: Prophet and pessimist look northwest. The Stewart Commission of Colorado College, Denver Public Library.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHulbert, Archer Butler. Where Rolls the Oregon: Prophet and Pessimist Look Northwest. [Colorado Springs] [Denver]: The Stewart Commission of Colorado College, Denver Public Library, 1933.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHulbert, Archer Butler. Where Rolls the Oregon: Prophet and Pessimist Look Northwest. The Stewart Commission of Colorado College, Denver Public Library, 1933.
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