APA aipamena

Epstein, S., & Epstein, B. W. (1956). The first book of codes and ciphers. New York: Franklin Watts.

Chicago Style aipamena

Epstein, Sam., và Beryl Williams Epstein. The First Book of Codes and Ciphers. New York: Franklin Watts, 1956.

MLA aipamena

Epstein, Sam., và Beryl Williams Epstein. The First Book of Codes and Ciphers. New York: Franklin Watts, 1956.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.