Hengen, N. L. (1999). Gateway to the Palouse: A story about the Spangles and other settlers on a new frontier (5th ed., rev. & enl.). Palouse Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHengen, Nona L. Gateway to the Palouse: A Story About the Spangles and Other Settlers on a New Frontier. 5th ed., rev. & enl. Spangle, Wash.: Palouse Press, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHengen, Nona L. Gateway to the Palouse: A Story About the Spangles and Other Settlers on a New Frontier. 5th ed., rev. & enl. Palouse Press, 1999.
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