| APA | F.O. (2012, February 13). In Acronym Geek. Retrieved 22:59, February 13, 2012, from http://www.acronymgeek.com/F.O |
| MLA | "F.O." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/F.O>. |
| MHRA | 'F.O', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/F.O> [accessed 13 February 2012] |
| Chicago | "F.O", http://www.acronymgeek.com/F.O (accessed February 13, 2012). |
| CBE/CSE | F.O [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/F.O. |
| Bluebook | F.O, http://www.acronymgeek.com/F.O (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, F.O, http://www.acronymgeek.com/F.O (optional description here) (as of Feb. 13, 2012, 22:59). |
| AMA | F.O. Acronym Geek. February 13, 2012, 22:59. Available at: http://www.acronymgeek.com/F.O. Accessed February 13, 2012, 22:59. |