| APA | EK. (2012, February 11). In Acronym Geek. Retrieved 17:24, February 11, 2012, from http://www.acronymgeek.com/EK |
| MLA | "EK." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/EK>. |
| MHRA | 'EK', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/EK> [accessed 11 February 2012] |
| Chicago | "EK", http://www.acronymgeek.com/EK (accessed February 11, 2012). |
| CBE/CSE | EK [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/EK. |
| Bluebook | EK, http://www.acronymgeek.com/EK (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EK, http://www.acronymgeek.com/EK (optional description here) (as of Feb. 11, 2012, 17:24). |
| AMA | EK. Acronym Geek. February 11, 2012, 17:24. Available at: http://www.acronymgeek.com/EK. Accessed February 11, 2012, 17:24. |