| APA | FYEN. (2012, February 15). In Acronym Geek. Retrieved 21:39, February 15, 2012, from http://www.acronymgeek.com/FYEN |
| MLA | "FYEN." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/FYEN>. |
| MHRA | 'FYEN', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/FYEN> [accessed 15 February 2012] |
| Chicago | "FYEN", http://www.acronymgeek.com/FYEN (accessed February 15, 2012). |
| CBE/CSE | FYEN [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/FYEN. |
| Bluebook | FYEN, http://www.acronymgeek.com/FYEN (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, FYEN, http://www.acronymgeek.com/FYEN (optional description here) (as of Feb. 15, 2012, 21:39). |
| AMA | FYEN. Acronym Geek. February 15, 2012, 21:39. Available at: http://www.acronymgeek.com/FYEN. Accessed February 15, 2012, 21:39. |