| APA | H4HA. (2012, February 15). In Acronym Geek. Retrieved 14:42, February 15, 2012, from http://www.acronymgeek.com/H4HA |
| MLA | "H4HA." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/H4HA>. |
| MHRA | 'H4HA', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/H4HA> [accessed 15 February 2012] |
| Chicago | "H4HA", http://www.acronymgeek.com/H4HA (accessed February 15, 2012). |
| CBE/CSE | H4HA [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/H4HA. |
| Bluebook | H4HA, http://www.acronymgeek.com/H4HA (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, H4HA, http://www.acronymgeek.com/H4HA (optional description here) (as of Feb. 15, 2012, 14:42). |
| AMA | H4HA. Acronym Geek. February 15, 2012, 14:42. Available at: http://www.acronymgeek.com/H4HA. Accessed February 15, 2012, 14:42. |