| APA | XYS. (2012, February 14). In Acronym Geek. Retrieved 07:46, February 14, 2012, from http://www.acronymgeek.com/XYS |
| MLA | "XYS." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/XYS>. |
| MHRA | 'XYS', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/XYS> [accessed 14 February 2012] |
| Chicago | "XYS", http://www.acronymgeek.com/XYS (accessed February 14, 2012). |
| CBE/CSE | XYS [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/XYS. |
| Bluebook | XYS, http://www.acronymgeek.com/XYS (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XYS, http://www.acronymgeek.com/XYS (optional description here) (as of Feb. 14, 2012, 07:46). |
| AMA | XYS. Acronym Geek. February 14, 2012, 07:46. Available at: http://www.acronymgeek.com/XYS. Accessed February 14, 2012, 07:46. |