| APA | HGRF. (2012, February 17). In Acronym Geek. Retrieved 03:09, February 17, 2012, from http://www.acronymgeek.com/HGRF |
| MLA | "HGRF." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HGRF>. |
| MHRA | 'HGRF', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HGRF> [accessed 17 February 2012] |
| Chicago | "HGRF", http://www.acronymgeek.com/HGRF (accessed February 17, 2012). |
| CBE/CSE | HGRF [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HGRF. |
| Bluebook | HGRF, http://www.acronymgeek.com/HGRF (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HGRF, http://www.acronymgeek.com/HGRF (optional description here) (as of Feb. 17, 2012, 03:09). |
| AMA | HGRF. Acronym Geek. February 17, 2012, 03:09. Available at: http://www.acronymgeek.com/HGRF. Accessed February 17, 2012, 03:09. |