| APA | U. (2012, February 14). In Acronym Geek. Retrieved 06:02, February 14, 2012, from http://www.acronymgeek.com/U |
| MLA | "U." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/U>. |
| MHRA | 'U', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/U> [accessed 14 February 2012] |
| Chicago | "U", http://www.acronymgeek.com/U (accessed February 14, 2012). |
| CBE/CSE | U [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/U. |
| Bluebook | U, http://www.acronymgeek.com/U (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, U, http://www.acronymgeek.com/U (optional description here) (as of Feb. 14, 2012, 06:02). |
| AMA | U. Acronym Geek. February 14, 2012, 06:02. Available at: http://www.acronymgeek.com/U. Accessed February 14, 2012, 06:02. |