Collard, S. B. (2018). Woodpeckers: Drilling holes and bagging bugs. Bucking Horse Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCollard, Sneed B. Woodpeckers: Drilling Holes and Bagging Bugs. Missoula, Montana: Bucking Horse Books, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCollard, Sneed B. Woodpeckers: Drilling Holes and Bagging Bugs. Bucking Horse Books, 2018.
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