| APA | ECOS. (2012, February 15). In Acronym Geek. Retrieved 23:18, February 15, 2012, from http://www.acronymgeek.com/ECOS |
| MLA | "ECOS." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/ECOS>. |
| MHRA | 'ECOS', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/ECOS> [accessed 15 February 2012] |
| Chicago | "ECOS", http://www.acronymgeek.com/ECOS (accessed February 15, 2012). |
| CBE/CSE | ECOS [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/ECOS. |
| Bluebook | ECOS, http://www.acronymgeek.com/ECOS (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ECOS, http://www.acronymgeek.com/ECOS (optional description here) (as of Feb. 15, 2012, 23:18). |
| AMA | ECOS. Acronym Geek. February 15, 2012, 23:18. Available at: http://www.acronymgeek.com/ECOS. Accessed February 15, 2012, 23:18. |