| APA | GEF. (2012, February 10). In Acronym Geek. Retrieved 11:20, February 10, 2012, from http://www.acronymgeek.com/GEF |
| MLA | "GEF." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/GEF>. |
| MHRA | 'GEF', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/GEF> [accessed 10 February 2012] |
| Chicago | "GEF", http://www.acronymgeek.com/GEF (accessed February 10, 2012). |
| CBE/CSE | GEF [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/GEF. |
| Bluebook | GEF, http://www.acronymgeek.com/GEF (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GEF, http://www.acronymgeek.com/GEF (optional description here) (as of Feb. 10, 2012, 11:20). |
| AMA | GEF. Acronym Geek. February 10, 2012, 11:20. Available at: http://www.acronymgeek.com/GEF. Accessed February 10, 2012, 11:20. |