| APA | HEAK. (2012, February 17). In Acronym Geek. Retrieved 06:32, February 17, 2012, from http://www.acronymgeek.com/HEAK |
| MLA | "HEAK." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HEAK>. |
| MHRA | 'HEAK', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HEAK> [accessed 17 February 2012] |
| Chicago | "HEAK", http://www.acronymgeek.com/HEAK (accessed February 17, 2012). |
| CBE/CSE | HEAK [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HEAK. |
| Bluebook | HEAK, http://www.acronymgeek.com/HEAK (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HEAK, http://www.acronymgeek.com/HEAK (optional description here) (as of Feb. 17, 2012, 06:32). |
| AMA | HEAK. Acronym Geek. February 17, 2012, 06:32. Available at: http://www.acronymgeek.com/HEAK. Accessed February 17, 2012, 06:32. |