Bagley, W. (2010). So rugged and mountainous: Blazing the Oregon and California trails, 1812-1848. University of Oklahoma Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBagley, Will. So Rugged and Mountainous: Blazing the Oregon and California Trails, 1812-1848. Norman: University of Oklahoma Press, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBagley, Will. So Rugged and Mountainous: Blazing the Oregon and California Trails, 1812-1848. University of Oklahoma Press, 2010.
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