| APA | FXO. (2012, February 11). In Acronym Geek. Retrieved 22:33, February 11, 2012, from http://www.acronymgeek.com/FXO |
| MLA | "FXO." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/FXO>. |
| MHRA | 'FXO', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/FXO> [accessed 11 February 2012] |
| Chicago | "FXO", http://www.acronymgeek.com/FXO (accessed February 11, 2012). |
| CBE/CSE | FXO [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/FXO. |
| Bluebook | FXO, http://www.acronymgeek.com/FXO (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, FXO, http://www.acronymgeek.com/FXO (optional description here) (as of Feb. 11, 2012, 22:33). |
| AMA | FXO. Acronym Geek. February 11, 2012, 22:33. Available at: http://www.acronymgeek.com/FXO. Accessed February 11, 2012, 22:33. |