| APA | XKK. (2012, February 13). In Acronym Geek. Retrieved 23:51, February 13, 2012, from http://www.acronymgeek.com/XKK |
| MLA | "XKK." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/XKK>. |
| MHRA | 'XKK', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/XKK> [accessed 13 February 2012] |
| Chicago | "XKK", http://www.acronymgeek.com/XKK (accessed February 13, 2012). |
| CBE/CSE | XKK [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/XKK. |
| Bluebook | XKK, http://www.acronymgeek.com/XKK (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XKK, http://www.acronymgeek.com/XKK (optional description here) (as of Feb. 13, 2012, 23:51). |
| AMA | XKK. Acronym Geek. February 13, 2012, 23:51. Available at: http://www.acronymgeek.com/XKK. Accessed February 13, 2012, 23:51. |