Lewty, P. J. (1995). Across the Columbia plain: Railroad expansion in the interior Northwest, 1885-1893. Washington State University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLewty, Peter J. Across the Columbia Plain: Railroad Expansion in the Interior Northwest, 1885-1893. Pullman, Wash.: Washington State University Press, 1995.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLewty, Peter J. Across the Columbia Plain: Railroad Expansion in the Interior Northwest, 1885-1893. Washington State University Press, 1995.
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