| APA | EYS. (2012, February 9). In Acronym Geek. Retrieved 19:58, February 9, 2012, from http://www.acronymgeek.com/EYS |
| MLA | "EYS." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/EYS>. |
| MHRA | 'EYS', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/EYS> [accessed 9 February 2012] |
| Chicago | "EYS", http://www.acronymgeek.com/EYS (accessed February 9, 2012). |
| CBE/CSE | EYS [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/EYS. |
| Bluebook | EYS, http://www.acronymgeek.com/EYS (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EYS, http://www.acronymgeek.com/EYS (optional description here) (as of Feb. 9, 2012, 19:58). |
| AMA | EYS. Acronym Geek. February 9, 2012, 19:58. Available at: http://www.acronymgeek.com/EYS. Accessed February 9, 2012, 19:58. |