| APA | UON. (2012, February 11). In Acronym Geek. Retrieved 22:58, February 11, 2012, from http://www.acronymgeek.com/UON |
| MLA | "UON." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/UON>. |
| MHRA | 'UON', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/UON> [accessed 11 February 2012] |
| Chicago | "UON", http://www.acronymgeek.com/UON (accessed February 11, 2012). |
| CBE/CSE | UON [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/UON. |
| Bluebook | UON, http://www.acronymgeek.com/UON (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, UON, http://www.acronymgeek.com/UON (optional description here) (as of Feb. 11, 2012, 22:58). |
| AMA | UON. Acronym Geek. February 11, 2012, 22:58. Available at: http://www.acronymgeek.com/UON. Accessed February 11, 2012, 22:58. |