Byrne, G. J., & Schmidt, G. M. (2018). Secrets of the Secret Service: The history and uncertain future of the US Secret Service (First Edition.). Center Street, Hachette Book Group.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रByrne, Gary J., और Grant M. Schmidt. Secrets of the Secret Service: The History and Uncertain Future of the US Secret Service. First Edition. New York, NY: Center Street, Hachette Book Group, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रByrne, Gary J., और Grant M. Schmidt. Secrets of the Secret Service: The History and Uncertain Future of the US Secret Service. First Edition. Center Street, Hachette Book Group, 2018.
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