| APA | EWOP. (2012, February 15). In Acronym Geek. Retrieved 21:34, February 15, 2012, from http://www.acronymgeek.com/EWOP |
| MLA | "EWOP." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/EWOP>. |
| MHRA | 'EWOP', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/EWOP> [accessed 15 February 2012] |
| Chicago | "EWOP", http://www.acronymgeek.com/EWOP (accessed February 15, 2012). |
| CBE/CSE | EWOP [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/EWOP. |
| Bluebook | EWOP, http://www.acronymgeek.com/EWOP (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EWOP, http://www.acronymgeek.com/EWOP (optional description here) (as of Feb. 15, 2012, 21:34). |
| AMA | EWOP. Acronym Geek. February 15, 2012, 21:34. Available at: http://www.acronymgeek.com/EWOP. Accessed February 15, 2012, 21:34. |