| APA | CIOH. (2012, February 15). In Acronym Geek. Retrieved 11:28, February 15, 2012, from http://www.acronymgeek.com/CIOH |
| MLA | "CIOH." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/CIOH>. |
| MHRA | 'CIOH', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/CIOH> [accessed 15 February 2012] |
| Chicago | "CIOH", http://www.acronymgeek.com/CIOH (accessed February 15, 2012). |
| CBE/CSE | CIOH [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/CIOH. |
| Bluebook | CIOH, http://www.acronymgeek.com/CIOH (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CIOH, http://www.acronymgeek.com/CIOH (optional description here) (as of Feb. 15, 2012, 11:28). |
| AMA | CIOH. Acronym Geek. February 15, 2012, 11:28. Available at: http://www.acronymgeek.com/CIOH. Accessed February 15, 2012, 11:28. |