| APA | HGRG. (2012, February 17). In Acronym Geek. Retrieved 06:34, February 17, 2012, from http://www.acronymgeek.com/HGRG |
| MLA | "HGRG." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HGRG>. |
| MHRA | 'HGRG', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HGRG> [accessed 17 February 2012] |
| Chicago | "HGRG", http://www.acronymgeek.com/HGRG (accessed February 17, 2012). |
| CBE/CSE | HGRG [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HGRG. |
| Bluebook | HGRG, http://www.acronymgeek.com/HGRG (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HGRG, http://www.acronymgeek.com/HGRG (optional description here) (as of Feb. 17, 2012, 06:34). |
| AMA | HGRG. Acronym Geek. February 17, 2012, 06:34. Available at: http://www.acronymgeek.com/HGRG. Accessed February 17, 2012, 06:34. |