| APA | XTSF. (2012, February 16). In Acronym Geek. Retrieved 23:50, February 16, 2012, from http://www.acronymgeek.com/XTSF |
| MLA | "XTSF." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/XTSF>. |
| MHRA | 'XTSF', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/XTSF> [accessed 16 February 2012] |
| Chicago | "XTSF", http://www.acronymgeek.com/XTSF (accessed February 16, 2012). |
| CBE/CSE | XTSF [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/XTSF. |
| Bluebook | XTSF, http://www.acronymgeek.com/XTSF (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XTSF, http://www.acronymgeek.com/XTSF (optional description here) (as of Feb. 16, 2012, 23:50). |
| AMA | XTSF. Acronym Geek. February 16, 2012, 23:50. Available at: http://www.acronymgeek.com/XTSF. Accessed February 16, 2012, 23:50. |