| APA | EFS. (2012, February 13). In Acronym Geek. Retrieved 22:59, February 13, 2012, from http://www.acronymgeek.com/EFS |
| MLA | "EFS." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/EFS>. |
| MHRA | 'EFS', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/EFS> [accessed 13 February 2012] |
| Chicago | "EFS", http://www.acronymgeek.com/EFS (accessed February 13, 2012). |
| CBE/CSE | EFS [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/EFS. |
| Bluebook | EFS, http://www.acronymgeek.com/EFS (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EFS, http://www.acronymgeek.com/EFS (optional description here) (as of Feb. 13, 2012, 22:59). |
| AMA | EFS. Acronym Geek. February 13, 2012, 22:59. Available at: http://www.acronymgeek.com/EFS. Accessed February 13, 2012, 22:59. |