| APA | EVSO. (2012, February 17). In Acronym Geek. Retrieved 07:45, February 17, 2012, from http://www.acronymgeek.com/EVSO |
| MLA | "EVSO." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/EVSO>. |
| MHRA | 'EVSO', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/EVSO> [accessed 17 February 2012] |
| Chicago | "EVSO", http://www.acronymgeek.com/EVSO (accessed February 17, 2012). |
| CBE/CSE | EVSO [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/EVSO. |
| Bluebook | EVSO, http://www.acronymgeek.com/EVSO (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EVSO, http://www.acronymgeek.com/EVSO (optional description here) (as of Feb. 17, 2012, 07:45). |
| AMA | EVSO. Acronym Geek. February 17, 2012, 07:45. Available at: http://www.acronymgeek.com/EVSO. Accessed February 17, 2012, 07:45. |