| APA | ECWO. (2012, February 11). In Acronym Geek. Retrieved 21:45, February 11, 2012, from http://www.acronymgeek.com/ECWO |
| MLA | "ECWO." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/ECWO>. |
| MHRA | 'ECWO', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/ECWO> [accessed 11 February 2012] |
| Chicago | "ECWO", http://www.acronymgeek.com/ECWO (accessed February 11, 2012). |
| CBE/CSE | ECWO [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/ECWO. |
| Bluebook | ECWO, http://www.acronymgeek.com/ECWO (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ECWO, http://www.acronymgeek.com/ECWO (optional description here) (as of Feb. 11, 2012, 21:45). |
| AMA | ECWO. Acronym Geek. February 11, 2012, 21:45. Available at: http://www.acronymgeek.com/ECWO. Accessed February 11, 2012, 21:45. |