| APA | GSFL. (2012, February 15). In Acronym Geek. Retrieved 05:50, February 15, 2012, from http://www.acronymgeek.com/GSFL |
| MLA | "GSFL." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/GSFL>. |
| MHRA | 'GSFL', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/GSFL> [accessed 15 February 2012] |
| Chicago | "GSFL", http://www.acronymgeek.com/GSFL (accessed February 15, 2012). |
| CBE/CSE | GSFL [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/GSFL. |
| Bluebook | GSFL, http://www.acronymgeek.com/GSFL (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GSFL, http://www.acronymgeek.com/GSFL (optional description here) (as of Feb. 15, 2012, 05:50). |
| AMA | GSFL. Acronym Geek. February 15, 2012, 05:50. Available at: http://www.acronymgeek.com/GSFL. Accessed February 15, 2012, 05:50. |