| APA | FPO. (2012, February 9). In Acronym Geek. Retrieved 18:58, February 9, 2012, from http://www.acronymgeek.com/FPO |
| MLA | "FPO." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/FPO>. |
| MHRA | 'FPO', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/FPO> [accessed 9 February 2012] |
| Chicago | "FPO", http://www.acronymgeek.com/FPO (accessed February 9, 2012). |
| CBE/CSE | FPO [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/FPO. |
| Bluebook | FPO, http://www.acronymgeek.com/FPO (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, FPO, http://www.acronymgeek.com/FPO (optional description here) (as of Feb. 9, 2012, 18:58). |
| AMA | FPO. Acronym Geek. February 9, 2012, 18:58. Available at: http://www.acronymgeek.com/FPO. Accessed February 9, 2012, 18:58. |