| APA | HGSL. (2012, February 16). In Acronym Geek. Retrieved 07:27, February 16, 2012, from http://www.acronymgeek.com/HGSL |
| MLA | "HGSL." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HGSL>. |
| MHRA | 'HGSL', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HGSL> [accessed 16 February 2012] |
| Chicago | "HGSL", http://www.acronymgeek.com/HGSL (accessed February 16, 2012). |
| CBE/CSE | HGSL [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HGSL. |
| Bluebook | HGSL, http://www.acronymgeek.com/HGSL (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HGSL, http://www.acronymgeek.com/HGSL (optional description here) (as of Feb. 16, 2012, 07:27). |
| AMA | HGSL. Acronym Geek. February 16, 2012, 07:27. Available at: http://www.acronymgeek.com/HGSL. Accessed February 16, 2012, 07:27. |