| APA | HGSD. (2012, February 15). In Acronym Geek. Retrieved 22:54, February 15, 2012, from http://www.acronymgeek.com/HGSD |
| MLA | "HGSD." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HGSD>. |
| MHRA | 'HGSD', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HGSD> [accessed 15 February 2012] |
| Chicago | "HGSD", http://www.acronymgeek.com/HGSD (accessed February 15, 2012). |
| CBE/CSE | HGSD [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HGSD. |
| Bluebook | HGSD, http://www.acronymgeek.com/HGSD (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HGSD, http://www.acronymgeek.com/HGSD (optional description here) (as of Feb. 15, 2012, 22:54). |
| AMA | HGSD. Acronym Geek. February 15, 2012, 22:54. Available at: http://www.acronymgeek.com/HGSD. Accessed February 15, 2012, 22:54. |