| APA | HGSM. (2012, February 15). In Acronym Geek. Retrieved 21:23, February 15, 2012, from http://www.acronymgeek.com/HGSM |
| MLA | "HGSM." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HGSM>. |
| MHRA | 'HGSM', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HGSM> [accessed 15 February 2012] |
| Chicago | "HGSM", http://www.acronymgeek.com/HGSM (accessed February 15, 2012). |
| CBE/CSE | HGSM [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HGSM. |
| Bluebook | HGSM, http://www.acronymgeek.com/HGSM (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HGSM, http://www.acronymgeek.com/HGSM (optional description here) (as of Feb. 15, 2012, 21:23). |
| AMA | HGSM. Acronym Geek. February 15, 2012, 21:23. Available at: http://www.acronymgeek.com/HGSM. Accessed February 15, 2012, 21:23. |