Unruh, J. D. (1979). The plains across: The overland emigrants and the trans-Mississippi West, 1840-60. University of Illinois Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnruh, John David. The Plains Across: The Overland Emigrants and the Trans-Mississippi West, 1840-60. Urbana: University of Illinois Press, 1979.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUnruh, John David. The Plains Across: The Overland Emigrants and the Trans-Mississippi West, 1840-60. University of Illinois Press, 1979.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.