Upson, N. (2010). Angel with two faces: A mystery featuring Josephine Tey (1st U.S. ed.). Harper Paperbacks.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUpson, Nicola. Angel with Two Faces: A Mystery Featuring Josephine Tey. 1st U.S. ed. New York: Harper Paperbacks, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रUpson, Nicola. Angel with Two Faces: A Mystery Featuring Josephine Tey. 1st U.S. ed. Harper Paperbacks, 2010.
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