| APA | ESOO. (2012, February 17). In Acronym Geek. Retrieved 02:22, February 17, 2012, from http://www.acronymgeek.com/ESOO |
| MLA | "ESOO." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/ESOO>. |
| MHRA | 'ESOO', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/ESOO> [accessed 17 February 2012] |
| Chicago | "ESOO", http://www.acronymgeek.com/ESOO (accessed February 17, 2012). |
| CBE/CSE | ESOO [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/ESOO. |
| Bluebook | ESOO, http://www.acronymgeek.com/ESOO (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ESOO, http://www.acronymgeek.com/ESOO (optional description here) (as of Feb. 17, 2012, 02:22). |
| AMA | ESOO. Acronym Geek. February 17, 2012, 02:22. Available at: http://www.acronymgeek.com/ESOO. Accessed February 17, 2012, 02:22. |