| APA | QLEO. (2012, February 15). In Acronym Geek. Retrieved 02:22, February 15, 2012, from http://www.acronymgeek.com/QLEO |
| MLA | "QLEO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/QLEO>. |
| MHRA | 'QLEO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/QLEO> [accessed 15 February 2012] |
| Chicago | "QLEO", http://www.acronymgeek.com/QLEO (accessed February 15, 2012). |
| CBE/CSE | QLEO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/QLEO. |
| Bluebook | QLEO, http://www.acronymgeek.com/QLEO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, QLEO, http://www.acronymgeek.com/QLEO (optional description here) (as of Feb. 15, 2012, 02:22). |
| AMA | QLEO. Acronym Geek. February 15, 2012, 02:22. Available at: http://www.acronymgeek.com/QLEO. Accessed February 15, 2012, 02:22. |