| APA | LEFS. (2012, February 16). In Acronym Geek. Retrieved 18:58, February 16, 2012, from http://www.acronymgeek.com/LEFS |
| MLA | "LEFS." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/LEFS>. |
| MHRA | 'LEFS', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/LEFS> [accessed 16 February 2012] |
| Chicago | "LEFS", http://www.acronymgeek.com/LEFS (accessed February 16, 2012). |
| CBE/CSE | LEFS [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/LEFS. |
| Bluebook | LEFS, http://www.acronymgeek.com/LEFS (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, LEFS, http://www.acronymgeek.com/LEFS (optional description here) (as of Feb. 16, 2012, 18:58). |
| AMA | LEFS. Acronym Geek. February 16, 2012, 18:58. Available at: http://www.acronymgeek.com/LEFS. Accessed February 16, 2012, 18:58. |