Fletcher, R. H. (1938). Montana highway historical markers .. Printed by Naegele Printing Co..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFletcher, Robert H. Montana Highway Historical Markers .. [Helena, Mont.]: Printed by Naegele Printing Co., 1938.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFletcher, Robert H. Montana Highway Historical Markers .. Printed by Naegele Printing Co., 1938.
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