| APA | XIRS. (2012, February 15). In Acronym Geek. Retrieved 12:00, February 15, 2012, from http://www.acronymgeek.com/XIRS |
| MLA | "XIRS." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/XIRS>. |
| MHRA | 'XIRS', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/XIRS> [accessed 15 February 2012] |
| Chicago | "XIRS", http://www.acronymgeek.com/XIRS (accessed February 15, 2012). |
| CBE/CSE | XIRS [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/XIRS. |
| Bluebook | XIRS, http://www.acronymgeek.com/XIRS (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XIRS, http://www.acronymgeek.com/XIRS (optional description here) (as of Feb. 15, 2012, 12:00). |
| AMA | XIRS. Acronym Geek. February 15, 2012, 12:00. Available at: http://www.acronymgeek.com/XIRS. Accessed February 15, 2012, 12:00. |