| APA | HGSF. (2012, February 16). In Acronym Geek. Retrieved 18:46, February 16, 2012, from http://www.acronymgeek.com/HGSF |
| MLA | "HGSF." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HGSF>. |
| MHRA | 'HGSF', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HGSF> [accessed 16 February 2012] |
| Chicago | "HGSF", http://www.acronymgeek.com/HGSF (accessed February 16, 2012). |
| CBE/CSE | HGSF [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HGSF. |
| Bluebook | HGSF, http://www.acronymgeek.com/HGSF (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HGSF, http://www.acronymgeek.com/HGSF (optional description here) (as of Feb. 16, 2012, 18:46). |
| AMA | HGSF. Acronym Geek. February 16, 2012, 18:46. Available at: http://www.acronymgeek.com/HGSF. Accessed February 16, 2012, 18:46. |