(1936). Secret writing; an introduction to cryptograms, ciphers and codes, by Henry Lysing.
Chicago Style (17th ed.) CitationSecret Writing; an Introduction to Cryptograms, Ciphers and Codes, by Henry Lysing. 1936.
MLA (9th ed.) CitationSecret Writing; an Introduction to Cryptograms, Ciphers and Codes, by Henry Lysing. 1936.
Warning: These citations may not always be 100% accurate.