LaLande, J. M., & Ogden, P. S. (1987). First over the Siskiyous: Peter Skene Ogden's 1826-1827 journey through the Oregon-California borderlands. Oregon Historical Society Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLaLande, Jeffrey M., और Peter Skene Ogden. First over the Siskiyous: Peter Skene Ogden's 1826-1827 Journey Through the Oregon-California Borderlands. Portland, Or.: Oregon Historical Society Press, 1987.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLaLande, Jeffrey M., और Peter Skene Ogden. First over the Siskiyous: Peter Skene Ogden's 1826-1827 Journey Through the Oregon-California Borderlands. Oregon Historical Society Press, 1987.
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