| APA | EXN. (2012, February 13). In Acronym Geek. Retrieved 20:56, February 13, 2012, from http://www.acronymgeek.com/EXN |
| MLA | "EXN." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/EXN>. |
| MHRA | 'EXN', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/EXN> [accessed 13 February 2012] |
| Chicago | "EXN", http://www.acronymgeek.com/EXN (accessed February 13, 2012). |
| CBE/CSE | EXN [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/EXN. |
| Bluebook | EXN, http://www.acronymgeek.com/EXN (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EXN, http://www.acronymgeek.com/EXN (optional description here) (as of Feb. 13, 2012, 20:56). |
| AMA | EXN. Acronym Geek. February 13, 2012, 20:56. Available at: http://www.acronymgeek.com/EXN. Accessed February 13, 2012, 20:56. |