Keller, T. (2016). Hidden Christmas: The surprising truth behind the birth of Christ. Viking.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKeller, Timothy. Hidden Christmas: The Surprising Truth Behind the Birth of Christ. New York, New York: Viking, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKeller, Timothy. Hidden Christmas: The Surprising Truth Behind the Birth of Christ. Viking, 2016.
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