APA (7th ed.) Citation
Kahn, D. (2004). The reader of gentlemen's mail: Herbert O. Yardley and the birth of American codebreaking. Yale University Press.
Chicago Style (17th ed.) Citation
Kahn, David. The Reader of Gentlemen's Mail: Herbert O. Yardley and the Birth of American Codebreaking. New Haven: Yale University Press, 2004.
MLA (9th ed.) Citation
Kahn, David. The Reader of Gentlemen's Mail: Herbert O. Yardley and the Birth of American Codebreaking. Yale University Press, 2004.
Warning: These citations may not always be 100% accurate.