| APA | EF-1. (2012, February 12). In Acronym Geek. Retrieved 01:55, February 12, 2012, from http://www.acronymgeek.com/EF-1 |
| MLA | "EF-1." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/EF-1>. |
| MHRA | 'EF-1', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/EF-1> [accessed 12 February 2012] |
| Chicago | "EF-1", http://www.acronymgeek.com/EF-1 (accessed February 12, 2012). |
| CBE/CSE | EF-1 [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/EF-1. |
| Bluebook | EF-1, http://www.acronymgeek.com/EF-1 (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EF-1, http://www.acronymgeek.com/EF-1 (optional description here) (as of Feb. 12, 2012, 01:55). |
| AMA | EF-1. Acronym Geek. February 12, 2012, 01:55. Available at: http://www.acronymgeek.com/EF-1. Accessed February 12, 2012, 01:55. |