| APA | EWO. (2012, February 13). In Acronym Geek. Retrieved 22:55, February 13, 2012, from http://www.acronymgeek.com/EWO |
| MLA | "EWO." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/EWO>. |
| MHRA | 'EWO', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/EWO> [accessed 13 February 2012] |
| Chicago | "EWO", http://www.acronymgeek.com/EWO (accessed February 13, 2012). |
| CBE/CSE | EWO [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/EWO. |
| Bluebook | EWO, http://www.acronymgeek.com/EWO (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EWO, http://www.acronymgeek.com/EWO (optional description here) (as of Feb. 13, 2012, 22:55). |
| AMA | EWO. Acronym Geek. February 13, 2012, 22:55. Available at: http://www.acronymgeek.com/EWO. Accessed February 13, 2012, 22:55. |