Easley, W. C. (2013). Matters of doubt: A Cal Claxton Oregon mystery. Poisoned Pen Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEasley, Warren C. Matters of Doubt: A Cal Claxton Oregon Mystery. Scpttsdale, AZ: Poisoned Pen Press, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEasley, Warren C. Matters of Doubt: A Cal Claxton Oregon Mystery. Poisoned Pen Press, 2013.
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