Vaughan, R. (2023). On the Oregon Trail (Center Point Large Print edition.). Center Point Large Print.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVaughan, Robert. On the Oregon Trail. Center Point Large Print edition. Thorndike, Maine: Center Point Large Print, 2023.
एमएलए (8वां संस्करण) प्रशस्ति पत्रVaughan, Robert. On the Oregon Trail. Center Point Large Print edition. Center Point Large Print, 2023.
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