| APA | HHGR. (2012, February 15). In Acronym Geek. Retrieved 12:56, February 15, 2012, from http://www.acronymgeek.com/HHGR |
| MLA | "HHGR." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HHGR>. |
| MHRA | 'HHGR', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HHGR> [accessed 15 February 2012] |
| Chicago | "HHGR", http://www.acronymgeek.com/HHGR (accessed February 15, 2012). |
| CBE/CSE | HHGR [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HHGR. |
| Bluebook | HHGR, http://www.acronymgeek.com/HHGR (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHGR, http://www.acronymgeek.com/HHGR (optional description here) (as of Feb. 15, 2012, 12:56). |
| AMA | HHGR. Acronym Geek. February 15, 2012, 12:56. Available at: http://www.acronymgeek.com/HHGR. Accessed February 15, 2012, 12:56. |