| APA | XFO. (2012, February 12). In Acronym Geek. Retrieved 06:58, February 12, 2012, from http://www.acronymgeek.com/XFO |
| MLA | "XFO." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/XFO>. |
| MHRA | 'XFO', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/XFO> [accessed 12 February 2012] |
| Chicago | "XFO", http://www.acronymgeek.com/XFO (accessed February 12, 2012). |
| CBE/CSE | XFO [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/XFO. |
| Bluebook | XFO, http://www.acronymgeek.com/XFO (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XFO, http://www.acronymgeek.com/XFO (optional description here) (as of Feb. 12, 2012, 06:58). |
| AMA | XFO. Acronym Geek. February 12, 2012, 06:58. Available at: http://www.acronymgeek.com/XFO. Accessed February 12, 2012, 06:58. |