| Style | Reference Text |
|---|
| APA | OP. (2009, November 23). In All Acronyms. Retrieved 20:40, November 23, 2009, from http://www.all-acronyms.com/OP |
| MLA | "OP." All Acronyms. 23 Nov 2009, 20:40. All Acronyms. 23 Nov 2009 <http://www.all-acronyms.com/OP>. |
| MHRA | 'OP', All Acronyms, 23 November 2009, 20:40, <http://www.all-acronyms.com/OP> [accessed 23 November 2009] |
| Chicago | "OP," http://www.all-acronyms.com/OP (accessed November 23, 2009). |
| CBE/CSE | OP [Internet]. All Acronyms; 2009 Nov 23, 20:40 [cited 2009 Nov 23]. Available from: http://www.all-acronyms.com/OP. |
| Bluebook | OP, http://www.all-acronyms.com/OP (last visited November 23, 2009). |
| Bluebook: Harvard JOLT | See All Acronyms, OP, http://www.all-acronyms.com/OP (optional description here) (as of Nov. 23, 2009, 20:40). |
| AMA | OP. All Acronyms. November 23, 2009, 20:40. Available at: http://www.all-acronyms.com/OP. Accessed November 23, 2009. |
original poster
Observation Post