| APA | LETN. (2012, February 16). In Acronym Geek. Retrieved 10:05, February 16, 2012, from http://www.acronymgeek.com/LETN |
| MLA | "LETN." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/LETN>. |
| MHRA | 'LETN', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/LETN> [accessed 16 February 2012] |
| Chicago | "LETN", http://www.acronymgeek.com/LETN (accessed February 16, 2012). |
| CBE/CSE | LETN [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/LETN. |
| Bluebook | LETN, http://www.acronymgeek.com/LETN (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, LETN, http://www.acronymgeek.com/LETN (optional description here) (as of Feb. 16, 2012, 10:05). |
| AMA | LETN. Acronym Geek. February 16, 2012, 10:05. Available at: http://www.acronymgeek.com/LETN. Accessed February 16, 2012, 10:05. |