| APA | KOS. (2012, February 9). In Acronym Geek. Retrieved 19:21, February 9, 2012, from http://www.acronymgeek.com/KOS |
| MLA | "KOS." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/KOS>. |
| MHRA | 'KOS', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/KOS> [accessed 9 February 2012] |
| Chicago | "KOS", http://www.acronymgeek.com/KOS (accessed February 9, 2012). |
| CBE/CSE | KOS [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/KOS. |
| Bluebook | KOS, http://www.acronymgeek.com/KOS (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, KOS, http://www.acronymgeek.com/KOS (optional description here) (as of Feb. 9, 2012, 19:21). |
| AMA | KOS. Acronym Geek. February 9, 2012, 19:21. Available at: http://www.acronymgeek.com/KOS. Accessed February 9, 2012, 19:21. |