Phelps, M. W. (2017). Dangerous ground: My friendship with a serial killer (First Kensington mass market edition.). Kensington Publishing Corp..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPhelps, M. William. Dangerous Ground: My Friendship with a Serial Killer. First Kensington mass market edition. New York, NY: Kensington Publishing Corp., 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPhelps, M. William. Dangerous Ground: My Friendship with a Serial Killer. First Kensington mass market edition. Kensington Publishing Corp., 2017.
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