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