| APA | OPWB. (2012, February 16). In Acronym Geek. Retrieved 12:45, February 16, 2012, from http://www.acronymgeek.com/OPWB |
| MLA | "OPWB." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OPWB>. |
| MHRA | 'OPWB', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OPWB> [accessed 16 February 2012] |
| Chicago | "OPWB", http://www.acronymgeek.com/OPWB (accessed February 16, 2012). |
| CBE/CSE | OPWB [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OPWB. |
| Bluebook | OPWB, http://www.acronymgeek.com/OPWB (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OPWB, http://www.acronymgeek.com/OPWB (optional description here) (as of Feb. 16, 2012, 12:45). |
| AMA | OPWB. Acronym Geek. February 16, 2012, 12:45. Available at: http://www.acronymgeek.com/OPWB. Accessed February 16, 2012, 12:45. |