| APA | GSL. (2012, February 14). In Acronym Geek. Retrieved 07:55, February 14, 2012, from http://www.acronymgeek.com/GSL |
| MLA | "GSL." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/GSL>. |
| MHRA | 'GSL', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/GSL> [accessed 14 February 2012] |
| Chicago | "GSL", http://www.acronymgeek.com/GSL (accessed February 14, 2012). |
| CBE/CSE | GSL [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/GSL. |
| Bluebook | GSL, http://www.acronymgeek.com/GSL (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GSL, http://www.acronymgeek.com/GSL (optional description here) (as of Feb. 14, 2012, 07:55). |
| AMA | GSL. Acronym Geek. February 14, 2012, 07:55. Available at: http://www.acronymgeek.com/GSL. Accessed February 14, 2012, 07:55. |