O'Donnell, T. (1988). That balance so rare: The story of Oregon. Oregon Historical Society Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रO'Donnell, Terence. That Balance so Rare: The Story of Oregon. Portland: Oregon Historical Society Press, 1988.
एमएलए (8वां संस्करण) प्रशस्ति पत्रO'Donnell, Terence. That Balance so Rare: The Story of Oregon. Oregon Historical Society Press, 1988.
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