Barnett, J. D. (1915). The operation of the initiative, referendum and recall in Oregon. Macmillan Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBarnett, James D. The Operation of the Initiative, Referendum and Recall in Oregon. New York: Macmillan Company, 1915.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBarnett, James D. The Operation of the Initiative, Referendum and Recall in Oregon. Macmillan Company, 1915.
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