| APA | XOA. (2012, February 15). In Acronym Geek. Retrieved 03:52, February 15, 2012, from http://www.acronymgeek.com/XOA |
| MLA | "XOA." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/XOA>. |
| MHRA | 'XOA', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/XOA> [accessed 15 February 2012] |
| Chicago | "XOA", http://www.acronymgeek.com/XOA (accessed February 15, 2012). |
| CBE/CSE | XOA [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/XOA. |
| Bluebook | XOA, http://www.acronymgeek.com/XOA (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XOA, http://www.acronymgeek.com/XOA (optional description here) (as of Feb. 15, 2012, 03:52). |
| AMA | XOA. Acronym Geek. February 15, 2012, 03:52. Available at: http://www.acronymgeek.com/XOA. Accessed February 15, 2012, 03:52. |