Ðîíàëüä ³ëüÿìÊëàðê (Ronald W. Clark), «The Man Who Broke Purple: the Life of Colonel William F. Friedman, Who Deciphered the Japanese Code in World War II »(Ëþäèíà, ÿêèé ðîçøèôðóâàâ Ïóðïóðíèé êîä: á³îãðàô³ÿ ïîëêîâíèêà ³ëüÿìà Ô. Ôð³äìàíà, ÿêèé ðîçøèôðóâàâ ÿïîíñüêèé êîä â ðîêè Äðóãî¿ ñâ³òîâî¿ â³éíè). Áîñòîí: Little Brown & Co, 1977. Ó Âåëèêîáðèòàí³¿ - ï³ä íàçâîþ «The Man Who Broke Purple: The life of the world's greatest cryptologist, Colonel William F. Friedman »(Ëþäèíà, ÿêèé ïðîáèâ Ïóðïóðíèé: Æèòòÿ âèäàòíîãî êðèïòîëîãà ñâ³òó ïîëêîâíèêà ³ëüÿìà Ô. Ôð³äìàíà). Ëîíäîí: Weidenfeld and Nicholson, 1977.
The Friedman legacy: A tribute to William and Elizebeth Friedman (Ñïàäùèíà ðîäèíè Ôð³äìàí: çá³ðíèê íà ÷åñòü ³ëüÿìà ³ Åë³çåáåò Ôð³äìàí). Âàøèíãòîí: National Security Agency, Center for Cryptologic History, Sources in Cryptologic History, November 3, 1992.
LD Callimahos, «The Legendary William F. Friedman »(Ëåãåíäàðíèé ³ëüÿì Ô. Ôð³äìàí). A lecture at the 41st annual convention of the American Cryptogram Association. Íüþ-Éîðê: Pace University, August 24, 1974.
Äåéâ³äÊàí (David Kahn), «The Code-Breakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet». (Äåøèôðîâùèê: âñåîñÿæíà ³ñòîð³ÿ ñåêðåòíîãî çâ'ÿçêó ç äàâí³õ ÷àñ³â ³ äî ³íòåðíåòó). Ïåðøå âèäàííÿ - The Macmillan Company, 1967 (ï³äçàãîëîâîê: «The Comprehensive History of Secret Writing»). Äîïîâíåí³ ³ ðîçøèðåí³ ïåðåâèäàííÿ - The Macmillan Company, 1972 (ï³äçàãîëîâîê: «The First Comprehensive History of Secret Communication From Ancient Times to the Threshold of Outer Space») ³ Scribner, 1996 (ï³äçàãîëîâîê: «The Comprehensive History of Secret Communication from Ancient Times to the Internet »).
Curt A. Zimansky, «William F. Friedman and the Voynich Manuscript »(³ëüÿì Ô. Ôð³äìàí ³ ðóêîïèñ Âîéíè÷à). Philological Quarterly. XLIX, 1970, ñòîð 433-443.
