| APA | HCK. (2012, February 14). In Acronym Geek. Retrieved 12:06, February 14, 2012, from http://www.acronymgeek.com/HCK |
| MLA | "HCK." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/HCK>. |
| MHRA | 'HCK', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/HCK> [accessed 14 February 2012] |
| Chicago | "HCK", http://www.acronymgeek.com/HCK (accessed February 14, 2012). |
| CBE/CSE | HCK [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/HCK. |
| Bluebook | HCK, http://www.acronymgeek.com/HCK (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HCK, http://www.acronymgeek.com/HCK (optional description here) (as of Feb. 14, 2012, 12:06). |
| AMA | HCK. Acronym Geek. February 14, 2012, 12:06. Available at: http://www.acronymgeek.com/HCK. Accessed February 14, 2012, 12:06. |