| Style | Reference Text |
|---|
| APA | PFO. (2010, February 9). In Acronym Geek. Retrieved 23:08, February 9, 2010, from http://www.acronymgeek.com/PFO |
| MLA | "PFO." Acronym Geek. 9 Feb 2010, 23:08. Acronym Geek. 9 Feb 2010 <http://www.acronymgeek.com/PFO>. |
| MHRA | 'PFO', Acronym Geek, 9 February 2010, 23:08, <http://www.acronymgeek.com/PFO> [accessed 9 February 2010] |
| Chicago | "PFO," http://www.acronymgeek.com/PFO (accessed February 9, 2010). |
| CBE/CSE | PFO [Internet]. Acronym Geek; 2010 Feb 9, 23:08 [cited 2010 Feb 9]. Available from: http://www.acronymgeek.com/PFO. |
| Bluebook | PFO, http://www.acronymgeek.com/PFO (last visited February 9, 2010). |
| Bluebook: Harvard JOLT | See Acronym Geek, PFO, http://www.acronymgeek.com/PFO (optional description here) (as of Feb. 9, 2010, 23:08). |
| AMA | PFO. Acronym Geek. February 9, 2010, 23:08. Available at: http://www.acronymgeek.com/PFO. Accessed February 9, 2010. |
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