| APA | HHGA. (2012, February 17). In Acronym Geek. Retrieved 02:04, February 17, 2012, from http://www.acronymgeek.com/HHGA |
| MLA | "HHGA." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HHGA>. |
| MHRA | 'HHGA', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HHGA> [accessed 17 February 2012] |
| Chicago | "HHGA", http://www.acronymgeek.com/HHGA (accessed February 17, 2012). |
| CBE/CSE | HHGA [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HHGA. |
| Bluebook | HHGA, http://www.acronymgeek.com/HHGA (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHGA, http://www.acronymgeek.com/HHGA (optional description here) (as of Feb. 17, 2012, 02:04). |
| AMA | HHGA. Acronym Geek. February 17, 2012, 02:04. Available at: http://www.acronymgeek.com/HHGA. Accessed February 17, 2012, 02:04. |