APA (7th ed.) Citation

Davidson, H., & Owen, R. E. (2006). Navy Boys Behind the Big Guns; Or, Sinking the German U-Boats. Project Gutenberg.

Chicago Style (17th ed.) Citation

Davidson, Halsey, and Robert Emmett Owen. Navy Boys Behind the Big Guns; Or, Sinking the German U-Boats. Project Gutenberg, 2006.

MLA (9th ed.) Citation

Davidson, Halsey, and Robert Emmett Owen. Navy Boys Behind the Big Guns; Or, Sinking the German U-Boats. Project Gutenberg, 2006.

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