Walker, E., Phillips, P. C., & Lewis, W. S. (1930). The Oregon missions as shown in the Walker letters, 1839-1851.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWalker, Elkanah, Paul C. Phillips, और William S. Lewis. The Oregon Missions as Shown in the Walker Letters, 1839-1851. [Missoula, Mont, 1930.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWalker, Elkanah, et al. The Oregon Missions as Shown in the Walker Letters, 1839-1851. 1930.
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