| APA | HHGE. (2012, February 15). In Acronym Geek. Retrieved 18:37, February 15, 2012, from http://www.acronymgeek.com/HHGE |
| MLA | "HHGE." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HHGE>. |
| MHRA | 'HHGE', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HHGE> [accessed 15 February 2012] |
| Chicago | "HHGE", http://www.acronymgeek.com/HHGE (accessed February 15, 2012). |
| CBE/CSE | HHGE [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HHGE. |
| Bluebook | HHGE, http://www.acronymgeek.com/HHGE (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHGE, http://www.acronymgeek.com/HHGE (optional description here) (as of Feb. 15, 2012, 18:37). |
| AMA | HHGE. Acronym Geek. February 15, 2012, 18:37. Available at: http://www.acronymgeek.com/HHGE. Accessed February 15, 2012, 18:37. |