| APA | XA. (2012, February 9). In Acronym Geek. Retrieved 17:47, February 9, 2012, from http://www.acronymgeek.com/XA |
| MLA | "XA." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/XA>. |
| MHRA | 'XA', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/XA> [accessed 9 February 2012] |
| Chicago | "XA", http://www.acronymgeek.com/XA (accessed February 9, 2012). |
| CBE/CSE | XA [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/XA. |
| Bluebook | XA, http://www.acronymgeek.com/XA (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XA, http://www.acronymgeek.com/XA (optional description here) (as of Feb. 9, 2012, 17:47). |
| AMA | XA. Acronym Geek. February 9, 2012, 17:47. Available at: http://www.acronymgeek.com/XA. Accessed February 9, 2012, 17:47. |