| APA | GFES. (2012, February 15). In Acronym Geek. Retrieved 23:02, February 15, 2012, from http://www.acronymgeek.com/GFES |
| MLA | "GFES." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/GFES>. |
| MHRA | 'GFES', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/GFES> [accessed 15 February 2012] |
| Chicago | "GFES", http://www.acronymgeek.com/GFES (accessed February 15, 2012). |
| CBE/CSE | GFES [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/GFES. |
| Bluebook | GFES, http://www.acronymgeek.com/GFES (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GFES, http://www.acronymgeek.com/GFES (optional description here) (as of Feb. 15, 2012, 23:02). |
| AMA | GFES. Acronym Geek. February 15, 2012, 23:02. Available at: http://www.acronymgeek.com/GFES. Accessed February 15, 2012, 23:02. |