Kahn, D. (1967). The codebreakers: The story of secret writing. Macmillan.
芝加哥风格引文Kahn, David. The Codebreakers: The Story of Secret Writing. New York: Macmillan, 1967.
MLA引文Kahn, David. The Codebreakers: The Story of Secret Writing. Macmillan, 1967.
警告：这些引文格式不一定是100％准确.