| APA | HAAK. (2012, February 11). In Acronym Geek. Retrieved 20:25, February 11, 2012, from http://www.acronymgeek.com/HAAK |
| MLA | "HAAK." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/HAAK>. |
| MHRA | 'HAAK', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/HAAK> [accessed 11 February 2012] |
| Chicago | "HAAK", http://www.acronymgeek.com/HAAK (accessed February 11, 2012). |
| CBE/CSE | HAAK [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/HAAK. |
| Bluebook | HAAK, http://www.acronymgeek.com/HAAK (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HAAK, http://www.acronymgeek.com/HAAK (optional description here) (as of Feb. 11, 2012, 20:25). |
| AMA | HAAK. Acronym Geek. February 11, 2012, 20:25. Available at: http://www.acronymgeek.com/HAAK. Accessed February 11, 2012, 20:25. |