Cushman, K. (1995). Catherine, called Birdy (1st Harper Trophy ed.). HarperTrophy.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCushman, Karen. Catherine, Called Birdy. 1st Harper Trophy ed. New York: HarperTrophy, 1995.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCushman, Karen. Catherine, Called Birdy. 1st Harper Trophy ed. HarperTrophy, 1995.
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