| APA | UFO. (2012, February 10). In Acronym Geek. Retrieved 17:06, February 10, 2012, from http://www.acronymgeek.com/UFO |
| MLA | "UFO." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/UFO>. |
| MHRA | 'UFO', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/UFO> [accessed 10 February 2012] |
| Chicago | "UFO", http://www.acronymgeek.com/UFO (accessed February 10, 2012). |
| CBE/CSE | UFO [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/UFO. |
| Bluebook | UFO, http://www.acronymgeek.com/UFO (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, UFO, http://www.acronymgeek.com/UFO (optional description here) (as of Feb. 10, 2012, 17:06). |
| AMA | UFO. Acronym Geek. February 10, 2012, 17:06. Available at: http://www.acronymgeek.com/UFO. Accessed February 10, 2012, 17:06. |