Lysing, H. (1974). Secret writing: An introduction to cryptograms, ciphers and codes (Dover edition, unabridged and unaltered republication of the work originally published in 1936.). Dover.
Chicago-Zitierstil (17. Ausg.)Lysing, Henry. Secret Writing: An Introduction to Cryptograms, Ciphers and Codes. Dover edition, unabridged and unaltered republication of the work originally published in 1936. New York: Dover, 1974.
MLA-Zitierstil (9. Ausg.)Lysing, Henry. Secret Writing: An Introduction to Cryptograms, Ciphers and Codes. Dover edition, unabridged and unaltered republication of the work originally published in 1936. Dover, 1974.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.