APA (7th ed.) Citation

Friedman, W. F., & Friedman, E. (1957). The Shakespearean ciphers examined: An analysis of cryptographic systems used as evidence that some author other than William Shakespeare wrote the plays commonly attributed to him. University Press.

Chicago Style (17th ed.) Citation

Friedman, William F., and Elizebeth Friedman. The Shakespearean Ciphers Examined: An Analysis of Cryptographic Systems Used as Evidence That Some Author Other than William Shakespeare Wrote the Plays Commonly Attributed to Him. Cambridge [England]: University Press, 1957.

MLA (9th ed.) Citation

Friedman, William F., and Elizebeth Friedman. The Shakespearean Ciphers Examined: An Analysis of Cryptographic Systems Used as Evidence That Some Author Other than William Shakespeare Wrote the Plays Commonly Attributed to Him. University Press, 1957.