| APA | HCKR. (2012, February 16). In Acronym Geek. Retrieved 05:27, February 16, 2012, from http://www.acronymgeek.com/HCKR |
| MLA | "HCKR." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HCKR>. |
| MHRA | 'HCKR', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HCKR> [accessed 16 February 2012] |
| Chicago | "HCKR", http://www.acronymgeek.com/HCKR (accessed February 16, 2012). |
| CBE/CSE | HCKR [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HCKR. |
| Bluebook | HCKR, http://www.acronymgeek.com/HCKR (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HCKR, http://www.acronymgeek.com/HCKR (optional description here) (as of Feb. 16, 2012, 05:27). |
| AMA | HCKR. Acronym Geek. February 16, 2012, 05:27. Available at: http://www.acronymgeek.com/HCKR. Accessed February 16, 2012, 05:27. |