| APA | CUO. (2012, February 14). In Acronym Geek. Retrieved 04:21, February 14, 2012, from http://www.acronymgeek.com/CUO |
| MLA | "CUO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/CUO>. |
| MHRA | 'CUO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/CUO> [accessed 14 February 2012] |
| Chicago | "CUO", http://www.acronymgeek.com/CUO (accessed February 14, 2012). |
| CBE/CSE | CUO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/CUO. |
| Bluebook | CUO, http://www.acronymgeek.com/CUO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CUO, http://www.acronymgeek.com/CUO (optional description here) (as of Feb. 14, 2012, 04:21). |
| AMA | CUO. Acronym Geek. February 14, 2012, 04:21. Available at: http://www.acronymgeek.com/CUO. Accessed February 14, 2012, 04:21. |