| APA | EKO. (2012, February 13). In Acronym Geek. Retrieved 22:51, February 13, 2012, from http://www.acronymgeek.com/EKO |
| MLA | "EKO." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/EKO>. |
| MHRA | 'EKO', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/EKO> [accessed 13 February 2012] |
| Chicago | "EKO", http://www.acronymgeek.com/EKO (accessed February 13, 2012). |
| CBE/CSE | EKO [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/EKO. |
| Bluebook | EKO, http://www.acronymgeek.com/EKO (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EKO, http://www.acronymgeek.com/EKO (optional description here) (as of Feb. 13, 2012, 22:51). |
| AMA | EKO. Acronym Geek. February 13, 2012, 22:51. Available at: http://www.acronymgeek.com/EKO. Accessed February 13, 2012, 22:51. |