APA (7th ed.) Citation

Winterbotham, F. W. (1974). The Ultra secret (1st U.S. ed.). Harper & Row.

Chicago Style (17th ed.) Citation

Winterbotham, F. W. The Ultra Secret. 1st U.S. ed. New York: Harper & Row, 1974.

MLA (9th ed.) Citation

Winterbotham, F. W. The Ultra Secret. 1st U.S. ed. Harper & Row, 1974.