| APA | EFY. (2012, February 10). In Acronym Geek. Retrieved 10:33, February 10, 2012, from http://www.acronymgeek.com/EFY |
| MLA | "EFY." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/EFY>. |
| MHRA | 'EFY', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/EFY> [accessed 10 February 2012] |
| Chicago | "EFY", http://www.acronymgeek.com/EFY (accessed February 10, 2012). |
| CBE/CSE | EFY [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/EFY. |
| Bluebook | EFY, http://www.acronymgeek.com/EFY (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EFY, http://www.acronymgeek.com/EFY (optional description here) (as of Feb. 10, 2012, 10:33). |
| AMA | EFY. Acronym Geek. February 10, 2012, 10:33. Available at: http://www.acronymgeek.com/EFY. Accessed February 10, 2012, 10:33. |