| Style | Reference Text |
|---|
| APA | OP. (2013, May 24). In All Acronyms. Retrieved 03:06, May 24, 2013, from http://www.all-acronyms.com/cat/1/OP |
| MLA | "OP." All Acronyms. 24 May 2013, 03:06. All Acronyms. 24 May 2013 <http://www.all-acronyms.com/cat/1/OP>. |
| MHRA | 'OP', All Acronyms, 24 May 2013, 03:06, <http://www.all-acronyms.com/cat/1/OP> [accessed 24 May 2013] |
| Chicago | "OP," http://www.all-acronyms.com/cat/1/OP (accessed May 24, 2013). |
| CBE/CSE | OP [Internet]. All Acronyms; 2013 May 24, 03:06 [cited 2013 May 24]. Available from: http://www.all-acronyms.com/cat/1/OP. |
| Bluebook | OP, http://www.all-acronyms.com/cat/1/OP (last visited May 24, 2013). |
| Bluebook: Harvard JOLT | See All Acronyms, OP, http://www.all-acronyms.com/cat/1/OP (optional description here) (as of May. 24, 2013, 03:06). |
| AMA | OP. All Acronyms. May 24, 2013, 03:06. Available at: http://www.all-acronyms.com/cat/1/OP. Accessed May 24, 2013. |
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