| APA | KOE. (2012, February 10). In Acronym Geek. Retrieved 17:59, February 10, 2012, from http://www.acronymgeek.com/KOE |
| MLA | "KOE." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/KOE>. |
| MHRA | 'KOE', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/KOE> [accessed 10 February 2012] |
| Chicago | "KOE", http://www.acronymgeek.com/KOE (accessed February 10, 2012). |
| CBE/CSE | KOE [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/KOE. |
| Bluebook | KOE, http://www.acronymgeek.com/KOE (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, KOE, http://www.acronymgeek.com/KOE (optional description here) (as of Feb. 10, 2012, 17:59). |
| AMA | KOE. Acronym Geek. February 10, 2012, 17:59. Available at: http://www.acronymgeek.com/KOE. Accessed February 10, 2012, 17:59. |