| APA | ESOS. (2012, February 15). In Acronym Geek. Retrieved 21:54, February 15, 2012, from http://www.acronymgeek.com/ESOS |
| MLA | "ESOS." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/ESOS>. |
| MHRA | 'ESOS', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/ESOS> [accessed 15 February 2012] |
| Chicago | "ESOS", http://www.acronymgeek.com/ESOS (accessed February 15, 2012). |
| CBE/CSE | ESOS [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/ESOS. |
| Bluebook | ESOS, http://www.acronymgeek.com/ESOS (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ESOS, http://www.acronymgeek.com/ESOS (optional description here) (as of Feb. 15, 2012, 21:54). |
| AMA | ESOS. Acronym Geek. February 15, 2012, 21:54. Available at: http://www.acronymgeek.com/ESOS. Accessed February 15, 2012, 21:54. |