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 Edition CitationFriedman, 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 [Eng.]: University Press, 1957.
MLA Edition CitationFriedman, 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.