| APA | LEO. (2012, February 9). In Acronym Geek. Retrieved 20:23, February 9, 2012, from http://www.acronymgeek.com/LEO |
| MLA | "LEO." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/LEO>. |
| MHRA | 'LEO', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/LEO> [accessed 9 February 2012] |
| Chicago | "LEO", http://www.acronymgeek.com/LEO (accessed February 9, 2012). |
| CBE/CSE | LEO [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/LEO. |
| Bluebook | LEO, http://www.acronymgeek.com/LEO (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, LEO, http://www.acronymgeek.com/LEO (optional description here) (as of Feb. 9, 2012, 20:23). |
| AMA | LEO. Acronym Geek. February 9, 2012, 20:23. Available at: http://www.acronymgeek.com/LEO. Accessed February 9, 2012, 20:23. |