| Style | Reference Text |
|---|
| APA | PFO. (2009, November 23). In All Acronyms. Retrieved 18:46, November 23, 2009, from http://www.all-acronyms.com/PFO |
| MLA | "PFO." All Acronyms. 23 Nov 2009, 18:46. All Acronyms. 23 Nov 2009 <http://www.all-acronyms.com/PFO>. |
| MHRA | 'PFO', All Acronyms, 23 November 2009, 18:46, <http://www.all-acronyms.com/PFO> [accessed 23 November 2009] |
| Chicago | "PFO," http://www.all-acronyms.com/PFO (accessed November 23, 2009). |
| CBE/CSE | PFO [Internet]. All Acronyms; 2009 Nov 23, 18:46 [cited 2009 Nov 23]. Available from: http://www.all-acronyms.com/PFO. |
| Bluebook | PFO, http://www.all-acronyms.com/PFO (last visited November 23, 2009). |
| Bluebook: Harvard JOLT | See All Acronyms, PFO, http://www.all-acronyms.com/PFO (optional description here) (as of Nov. 23, 2009, 18:46). |
| AMA | PFO. All Acronyms. November 23, 2009, 18:46. Available at: http://www.all-acronyms.com/PFO. Accessed November 23, 2009. |
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