Graysmith, R. (2018). Zodiac unmasked: The identity of america's most elusive serial killer revealed (Unabridged.). Tantor Media.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGraysmith, Robert. Zodiac Unmasked: The Identity of America's Most Elusive Serial Killer Revealed. Unabridged. Old Saybrook: Tantor Media, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGraysmith, Robert. Zodiac Unmasked: The Identity of America's Most Elusive Serial Killer Revealed. Unabridged. Tantor Media, 2018.
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