APA (7th ed.) Citation

Mason, D. (1968). U-boat: The secret menace. [Ballantine Books].

Chicago Style (17th ed.) Citation

Mason, David. U-boat: The Secret Menace. [New York]: [Ballantine Books], 1968.

MLA (9th ed.) Citation

Mason, David. U-boat: The Secret Menace. [Ballantine Books], 1968.

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