| APA | EKF. (2012, February 11). In Acronym Geek. Retrieved 17:08, February 11, 2012, from http://www.acronymgeek.com/EKF |
| MLA | "EKF." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/EKF>. |
| MHRA | 'EKF', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/EKF> [accessed 11 February 2012] |
| Chicago | "EKF", http://www.acronymgeek.com/EKF (accessed February 11, 2012). |
| CBE/CSE | EKF [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/EKF. |
| Bluebook | EKF, http://www.acronymgeek.com/EKF (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EKF, http://www.acronymgeek.com/EKF (optional description here) (as of Feb. 11, 2012, 17:08). |
| AMA | EKF. Acronym Geek. February 11, 2012, 17:08. Available at: http://www.acronymgeek.com/EKF. Accessed February 11, 2012, 17:08. |