Simon, S., & Heller, J. (2001). The wings of darkness and other cases (Unabridged.). Recorded Books Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSimon, Seymour, और Johnny Heller. The Wings of Darkness and Other Cases. Unabridged. Prince Frederick: Recorded Books Inc., 2001.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSimon, Seymour, और Johnny Heller. The Wings of Darkness and Other Cases. Unabridged. Recorded Books Inc., 2001.
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