| APA | OPWF. (2012, February 15). In Acronym Geek. Retrieved 07:11, February 15, 2012, from http://www.acronymgeek.com/OPWF |
| MLA | "OPWF." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OPWF>. |
| MHRA | 'OPWF', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OPWF> [accessed 15 February 2012] |
| Chicago | "OPWF", http://www.acronymgeek.com/OPWF (accessed February 15, 2012). |
| CBE/CSE | OPWF [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OPWF. |
| Bluebook | OPWF, http://www.acronymgeek.com/OPWF (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OPWF, http://www.acronymgeek.com/OPWF (optional description here) (as of Feb. 15, 2012, 07:11). |
| AMA | OPWF. Acronym Geek. February 15, 2012, 07:11. Available at: http://www.acronymgeek.com/OPWF. Accessed February 15, 2012, 07:11. |