| APA | EYSO. (2012, February 11). In Acronym Geek. Retrieved 21:44, February 11, 2012, from http://www.acronymgeek.com/EYSO |
| MLA | "EYSO." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/EYSO>. |
| MHRA | 'EYSO', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/EYSO> [accessed 11 February 2012] |
| Chicago | "EYSO", http://www.acronymgeek.com/EYSO (accessed February 11, 2012). |
| CBE/CSE | EYSO [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/EYSO. |
| Bluebook | EYSO, http://www.acronymgeek.com/EYSO (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EYSO, http://www.acronymgeek.com/EYSO (optional description here) (as of Feb. 11, 2012, 21:44). |
| AMA | EYSO. Acronym Geek. February 11, 2012, 21:44. Available at: http://www.acronymgeek.com/EYSO. Accessed February 11, 2012, 21:44. |