| APA | OPWE. (2012, February 16). In Acronym Geek. Retrieved 18:10, February 16, 2012, from http://www.acronymgeek.com/OPWE |
| MLA | "OPWE." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OPWE>. |
| MHRA | 'OPWE', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OPWE> [accessed 16 February 2012] |
| Chicago | "OPWE", http://www.acronymgeek.com/OPWE (accessed February 16, 2012). |
| CBE/CSE | OPWE [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OPWE. |
| Bluebook | OPWE, http://www.acronymgeek.com/OPWE (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OPWE, http://www.acronymgeek.com/OPWE (optional description here) (as of Feb. 16, 2012, 18:10). |
| AMA | OPWE. Acronym Geek. February 16, 2012, 18:10. Available at: http://www.acronymgeek.com/OPWE. Accessed February 16, 2012, 18:10. |