APA (7th ed.) Citation

Winterbotham, F. W. (1974). The ultra secret / (by) F.W. Winterbotham. Weidenfeld and Nicolson.

Chicago Style (17th ed.) Citation

Winterbotham, F. W. The Ultra Secret / (by) F.W. Winterbotham. London: Weidenfeld and Nicolson, 1974.

MLA (9th ed.) Citation

Winterbotham, F. W. The Ultra Secret / (by) F.W. Winterbotham. Weidenfeld and Nicolson, 1974.

Warning: These citations may not always be 100% accurate.