| APA | HCKZ. (2012, February 15). In Acronym Geek. Retrieved 09:25, February 15, 2012, from http://www.acronymgeek.com/HCKZ |
| MLA | "HCKZ." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HCKZ>. |
| MHRA | 'HCKZ', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HCKZ> [accessed 15 February 2012] |
| Chicago | "HCKZ", http://www.acronymgeek.com/HCKZ (accessed February 15, 2012). |
| CBE/CSE | HCKZ [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HCKZ. |
| Bluebook | HCKZ, http://www.acronymgeek.com/HCKZ (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HCKZ, http://www.acronymgeek.com/HCKZ (optional description here) (as of Feb. 15, 2012, 09:25). |
| AMA | HCKZ. Acronym Geek. February 15, 2012, 09:25. Available at: http://www.acronymgeek.com/HCKZ. Accessed February 15, 2012, 09:25. |