| APA | CHUO. (2012, February 16). In Acronym Geek. Retrieved 14:56, February 16, 2012, from http://www.acronymgeek.com/CHUO |
| MLA | "CHUO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/CHUO>. |
| MHRA | 'CHUO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/CHUO> [accessed 16 February 2012] |
| Chicago | "CHUO", http://www.acronymgeek.com/CHUO (accessed February 16, 2012). |
| CBE/CSE | CHUO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/CHUO. |
| Bluebook | CHUO, http://www.acronymgeek.com/CHUO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CHUO, http://www.acronymgeek.com/CHUO (optional description here) (as of Feb. 16, 2012, 14:56). |
| AMA | CHUO. Acronym Geek. February 16, 2012, 14:56. Available at: http://www.acronymgeek.com/CHUO. Accessed February 16, 2012, 14:56. |