APA (7th ed.) Citation

Connolly, J. B. (2007). The U-boat hunters. Project Gutenberg.

Chicago Style (17th ed.) Citation

Connolly, James B. The U-boat Hunters. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Connolly, James B. The U-boat Hunters. Project Gutenberg, 2007.

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