| APA | HAKR. (2012, February 16). In Acronym Geek. Retrieved 20:05, February 16, 2012, from http://www.acronymgeek.com/HAKR |
| MLA | "HAKR." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HAKR>. |
| MHRA | 'HAKR', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HAKR> [accessed 16 February 2012] |
| Chicago | "HAKR", http://www.acronymgeek.com/HAKR (accessed February 16, 2012). |
| CBE/CSE | HAKR [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HAKR. |
| Bluebook | HAKR, http://www.acronymgeek.com/HAKR (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HAKR, http://www.acronymgeek.com/HAKR (optional description here) (as of Feb. 16, 2012, 20:05). |
| AMA | HAKR. Acronym Geek. February 16, 2012, 20:05. Available at: http://www.acronymgeek.com/HAKR. Accessed February 16, 2012, 20:05. |