| APA | HGR. (2012, February 13). In Acronym Geek. Retrieved 23:48, February 13, 2012, from http://www.acronymgeek.com/HGR |
| MLA | "HGR." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/HGR>. |
| MHRA | 'HGR', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/HGR> [accessed 13 February 2012] |
| Chicago | "HGR", http://www.acronymgeek.com/HGR (accessed February 13, 2012). |
| CBE/CSE | HGR [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/HGR. |
| Bluebook | HGR, http://www.acronymgeek.com/HGR (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HGR, http://www.acronymgeek.com/HGR (optional description here) (as of Feb. 13, 2012, 23:48). |
| AMA | HGR. Acronym Geek. February 13, 2012, 23:48. Available at: http://www.acronymgeek.com/HGR. Accessed February 13, 2012, 23:48. |