Kahn, D. (1967). The codebreakers: The story of secret writing (First edition.). The Macmillan Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKahn, David. The Codebreakers: The Story of Secret Writing. First edition. New York: The Macmillan Company, 1967.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKahn, David. The Codebreakers: The Story of Secret Writing. First edition. The Macmillan Company, 1967.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.