| APA | FES. (2012, February 15). In Acronym Geek. Retrieved 03:41, February 15, 2012, from http://www.acronymgeek.com/FES |
| MLA | "FES." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/FES>. |
| MHRA | 'FES', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/FES> [accessed 15 February 2012] |
| Chicago | "FES", http://www.acronymgeek.com/FES (accessed February 15, 2012). |
| CBE/CSE | FES [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/FES. |
| Bluebook | FES, http://www.acronymgeek.com/FES (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, FES, http://www.acronymgeek.com/FES (optional description here) (as of Feb. 15, 2012, 03:41). |
| AMA | FES. Acronym Geek. February 15, 2012, 03:41. Available at: http://www.acronymgeek.com/FES. Accessed February 15, 2012, 03:41. |