Leonnig, C. (2021). Zero fail: The rise and fall of the Secret Service (First edition.). Random House.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLeonnig, Carol. Zero Fail: The Rise and Fall of the Secret Service. First edition. New York: Random House, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLeonnig, Carol. Zero Fail: The Rise and Fall of the Secret Service. First edition. Random House, 2021.
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