APA (7th ed.) Citation

Allen & Polmar. (1996). Codename downfall: The secret plan to invade Japan. Headline Book Publishing.

Chicago Style (17th ed.) Citation

Allen and Polmar. Codename Downfall: The Secret Plan to Invade Japan. London: Headline Book Publishing, 1996.

MLA (8th ed.) Citation

Allen and Polmar. Codename Downfall: The Secret Plan to Invade Japan. Headline Book Publishing, 1996.

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