APA (7th ed.) Citation

D'Agapeyeff, A. (1974). Codes and ciphers. Oxford University Press; Gale Research Co..

Chicago Style (17th ed.) Citation

D'Agapeyeff, A. Codes and Ciphers. London, New York : Detroit: Oxford University Press; Gale Research Co., 1974.

MLA (9th ed.) Citation

D'Agapeyeff, A. Codes and Ciphers. Oxford University Press; Gale Research Co., 1974.