| APA | COHF. (2012, February 15). In Acronym Geek. Retrieved 21:21, February 15, 2012, from http://www.acronymgeek.com/COHF |
| MLA | "COHF." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/COHF>. |
| MHRA | 'COHF', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/COHF> [accessed 15 February 2012] |
| Chicago | "COHF", http://www.acronymgeek.com/COHF (accessed February 15, 2012). |
| CBE/CSE | COHF [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/COHF. |
| Bluebook | COHF, http://www.acronymgeek.com/COHF (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, COHF, http://www.acronymgeek.com/COHF (optional description here) (as of Feb. 15, 2012, 21:21). |
| AMA | COHF. Acronym Geek. February 15, 2012, 21:21. Available at: http://www.acronymgeek.com/COHF. Accessed February 15, 2012, 21:21. |