Cushman, D. (2009). Dirk Bones and the mystery of the missing books. HarperCollinsPublishers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCushman, Doug. Dirk Bones and the Mystery of the Missing Books. New York: HarperCollinsPublishers, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCushman, Doug. Dirk Bones and the Mystery of the Missing Books. HarperCollinsPublishers, 2009.
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