| APA | XTIS. (2012, February 15). In Acronym Geek. Retrieved 10:29, February 15, 2012, from http://www.acronymgeek.com/XTIS |
| MLA | "XTIS." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/XTIS>. |
| MHRA | 'XTIS', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/XTIS> [accessed 15 February 2012] |
| Chicago | "XTIS", http://www.acronymgeek.com/XTIS (accessed February 15, 2012). |
| CBE/CSE | XTIS [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/XTIS. |
| Bluebook | XTIS, http://www.acronymgeek.com/XTIS (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XTIS, http://www.acronymgeek.com/XTIS (optional description here) (as of Feb. 15, 2012, 10:29). |
| AMA | XTIS. Acronym Geek. February 15, 2012, 10:29. Available at: http://www.acronymgeek.com/XTIS. Accessed February 15, 2012, 10:29. |