Coulter, C., Raudman, R., & Andrews, M. (2017). Enigma (Unabridged.). Brilliance Audio ; Distributed by Recorded Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCoulter, Catherine, Renée Raudman, और MacLeod Andrews. Enigma. Unabridged. Grand Haven, Mich. : Prince Frederick, MD: Brilliance Audio ; Distributed by Recorded Books, 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCoulter, Catherine, et al. Enigma. Unabridged. Brilliance Audio ; Distributed by Recorded Books, 2017.
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