| APA | HCOE. (2012, February 17). In Acronym Geek. Retrieved 00:05, February 17, 2012, from http://www.acronymgeek.com/HCOE |
| MLA | "HCOE." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HCOE>. |
| MHRA | 'HCOE', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HCOE> [accessed 17 February 2012] |
| Chicago | "HCOE", http://www.acronymgeek.com/HCOE (accessed February 17, 2012). |
| CBE/CSE | HCOE [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HCOE. |
| Bluebook | HCOE, http://www.acronymgeek.com/HCOE (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HCOE, http://www.acronymgeek.com/HCOE (optional description here) (as of Feb. 17, 2012, 00:05). |
| AMA | HCOE. Acronym Geek. February 17, 2012, 00:05. Available at: http://www.acronymgeek.com/HCOE. Accessed February 17, 2012, 00:05. |