| APA | PFOE. (2012, February 15). In Acronym Geek. Retrieved 18:59, February 15, 2012, from http://www.acronymgeek.com/PFOE |
| MLA | "PFOE." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PFOE>. |
| MHRA | 'PFOE', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PFOE> [accessed 15 February 2012] |
| Chicago | "PFOE", http://www.acronymgeek.com/PFOE (accessed February 15, 2012). |
| CBE/CSE | PFOE [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PFOE. |
| Bluebook | PFOE, http://www.acronymgeek.com/PFOE (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PFOE, http://www.acronymgeek.com/PFOE (optional description here) (as of Feb. 15, 2012, 18:59). |
| AMA | PFOE. Acronym Geek. February 15, 2012, 18:59. Available at: http://www.acronymgeek.com/PFOE. Accessed February 15, 2012, 18:59. |