APA (7th ed.) Citation

(2004). The reader of gentlemen's mail: Herbert O. Yardley and the birth of American codebreaking / David Kahn.

Chicago Style (17th ed.) Citation

The Reader of Gentlemen's Mail: Herbert O. Yardley and the Birth of American Codebreaking / David Kahn. 2004.

MLA (9th ed.) Citation

The Reader of Gentlemen's Mail: Herbert O. Yardley and the Birth of American Codebreaking / David Kahn. 2004.

Warning: These citations may not always be 100% accurate.