| APA | OPWW. (2012, February 15). In Acronym Geek. Retrieved 09:13, February 15, 2012, from http://www.acronymgeek.com/OPWW |
| MLA | "OPWW." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OPWW>. |
| MHRA | 'OPWW', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OPWW> [accessed 15 February 2012] |
| Chicago | "OPWW", http://www.acronymgeek.com/OPWW (accessed February 15, 2012). |
| CBE/CSE | OPWW [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OPWW. |
| Bluebook | OPWW, http://www.acronymgeek.com/OPWW (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OPWW, http://www.acronymgeek.com/OPWW (optional description here) (as of Feb. 15, 2012, 09:13). |
| AMA | OPWW. Acronym Geek. February 15, 2012, 09:13. Available at: http://www.acronymgeek.com/OPWW. Accessed February 15, 2012, 09:13. |