| APA | HAHO. (2012, February 15). In Acronym Geek. Retrieved 23:55, February 15, 2012, from http://www.acronymgeek.com/HAHO |
| MLA | "HAHO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HAHO>. |
| MHRA | 'HAHO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HAHO> [accessed 15 February 2012] |
| Chicago | "HAHO", http://www.acronymgeek.com/HAHO (accessed February 15, 2012). |
| CBE/CSE | HAHO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HAHO. |
| Bluebook | HAHO, http://www.acronymgeek.com/HAHO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HAHO, http://www.acronymgeek.com/HAHO (optional description here) (as of Feb. 15, 2012, 23:55). |
| AMA | HAHO. Acronym Geek. February 15, 2012, 23:55. Available at: http://www.acronymgeek.com/HAHO. Accessed February 15, 2012, 23:55. |