Friedman, W. F. (2006). The Friedman legacy: A tribute to William and Elizebeth Friedman (Third printing.). Center for Cryptologic History, National Security Agency.
Chicago Style (17th ed.) CitationFriedman, William F. The Friedman Legacy: A Tribute to William and Elizebeth Friedman. Third printing. [Fort George G. Meade, Maryland]: Center for Cryptologic History, National Security Agency, 2006.
MLA (9th ed.) CitationFriedman, William F. The Friedman Legacy: A Tribute to William and Elizebeth Friedman. Third printing. Center for Cryptologic History, National Security Agency, 2006.
Warning: These citations may not always be 100% accurate.