APA (7th ed.) Citation

Allen. (2003). The Hitler/Hess deception: British intelligence's best-kept secret of the Second World War. HarperCollins.

Chicago Style (17th ed.) Citation

Allen. The Hitler/Hess Deception: British Intelligence's Best-kept Secret of the Second World War. London: HarperCollins, 2003.

MLA (8th ed.) Citation

Allen. The Hitler/Hess Deception: British Intelligence's Best-kept Secret of the Second World War. HarperCollins, 2003.

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