| APA | 9U. (2012, February 11). In Acronym Geek. Retrieved 18:06, February 11, 2012, from http://www.acronymgeek.com/9U |
| MLA | "9U." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/9U>. |
| MHRA | '9U', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/9U> [accessed 11 February 2012] |
| Chicago | "9U", http://www.acronymgeek.com/9U (accessed February 11, 2012). |
| CBE/CSE | 9U [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/9U. |
| Bluebook | 9U, http://www.acronymgeek.com/9U (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 9U, http://www.acronymgeek.com/9U (optional description here) (as of Feb. 11, 2012, 18:06). |
| AMA | 9U. Acronym Geek. February 11, 2012, 18:06. Available at: http://www.acronymgeek.com/9U. Accessed February 11, 2012, 18:06. |