O'Neill, E. (2019). Gray day: My undercover mission to expose America's first cyber spy (First edition.). Crown Publishers.
Chicago Style (17th ed.) CitationO'Neill, Eric. Gray Day: My Undercover Mission to Expose America's First Cyber Spy. First edition. New York: Crown Publishers, 2019.
MLA (8th ed.) CitationO'Neill, Eric. Gray Day: My Undercover Mission to Expose America's First Cyber Spy. First edition. Crown Publishers, 2019.
Warning: These citations may not always be 100% accurate.