| APA | HGSG. (2012, February 16). In Acronym Geek. Retrieved 17:28, February 16, 2012, from http://www.acronymgeek.com/HGSG |
| MLA | "HGSG." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HGSG>. |
| MHRA | 'HGSG', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HGSG> [accessed 16 February 2012] |
| Chicago | "HGSG", http://www.acronymgeek.com/HGSG (accessed February 16, 2012). |
| CBE/CSE | HGSG [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HGSG. |
| Bluebook | HGSG, http://www.acronymgeek.com/HGSG (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HGSG, http://www.acronymgeek.com/HGSG (optional description here) (as of Feb. 16, 2012, 17:28). |
| AMA | HGSG. Acronym Geek. February 16, 2012, 17:28. Available at: http://www.acronymgeek.com/HGSG. Accessed February 16, 2012, 17:28. |