| APA | FKO. (2012, February 11). In Acronym Geek. Retrieved 22:23, February 11, 2012, from http://www.acronymgeek.com/FKO |
| MLA | "FKO." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/FKO>. |
| MHRA | 'FKO', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/FKO> [accessed 11 February 2012] |
| Chicago | "FKO", http://www.acronymgeek.com/FKO (accessed February 11, 2012). |
| CBE/CSE | FKO [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/FKO. |
| Bluebook | FKO, http://www.acronymgeek.com/FKO (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, FKO, http://www.acronymgeek.com/FKO (optional description here) (as of Feb. 11, 2012, 22:23). |
| AMA | FKO. Acronym Geek. February 11, 2012, 22:23. Available at: http://www.acronymgeek.com/FKO. Accessed February 11, 2012, 22:23. |