WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). U-boat. Retrieved September 21, 2026, from http://smartdefine.org/u-boat/definitions/1317920 |
| Chicago | WordNet. 2010. "U-boat" http://smartdefine.org/u-boat/definitions/1317920 (accessed September 21, 2026). |
| Harvard | WordNet 2010, U-boat, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/u-boat/definitions/1317920>. |
| MLA | WordNet. "U-boat" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/u-boat/definitions/1317920> |