| APA | EXO. (2012, February 14). In Acronym Geek. Retrieved 07:10, February 14, 2012, from http://www.acronymgeek.com/EXO |
| MLA | "EXO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/EXO>. |
| MHRA | 'EXO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/EXO> [accessed 14 February 2012] |
| Chicago | "EXO", http://www.acronymgeek.com/EXO (accessed February 14, 2012). |
| CBE/CSE | EXO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/EXO. |
| Bluebook | EXO, http://www.acronymgeek.com/EXO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EXO, http://www.acronymgeek.com/EXO (optional description here) (as of Feb. 14, 2012, 07:10). |
| AMA | EXO. Acronym Geek. February 14, 2012, 07:10. Available at: http://www.acronymgeek.com/EXO. Accessed February 14, 2012, 07:10. |