| APA | HCCO. (2012, February 16). In Acronym Geek. Retrieved 23:09, February 16, 2012, from http://www.acronymgeek.com/HCCO |
| MLA | "HCCO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HCCO>. |
| MHRA | 'HCCO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HCCO> [accessed 16 February 2012] |
| Chicago | "HCCO", http://www.acronymgeek.com/HCCO (accessed February 16, 2012). |
| CBE/CSE | HCCO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HCCO. |
| Bluebook | HCCO, http://www.acronymgeek.com/HCCO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HCCO, http://www.acronymgeek.com/HCCO (optional description here) (as of Feb. 16, 2012, 23:09). |
| AMA | HCCO. Acronym Geek. February 16, 2012, 23:09. Available at: http://www.acronymgeek.com/HCCO. Accessed February 16, 2012, 23:09. |