Loh-Hagan, V. (2019). Heading West: Oregon Trail and westward expansion. 45th Parallel Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLoh-Hagan, Virginia. Heading West: Oregon Trail and Westward Expansion. Ann Arbor, MI: 45th Parallel Press, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLoh-Hagan, Virginia. Heading West: Oregon Trail and Westward Expansion. 45th Parallel Press, 2019.
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