| APA | XTO. (2012, February 14). In Acronym Geek. Retrieved 19:26, February 14, 2012, from http://www.acronymgeek.com/XTO |
| MLA | "XTO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/XTO>. |
| MHRA | 'XTO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/XTO> [accessed 14 February 2012] |
| Chicago | "XTO", http://www.acronymgeek.com/XTO (accessed February 14, 2012). |
| CBE/CSE | XTO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/XTO. |
| Bluebook | XTO, http://www.acronymgeek.com/XTO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XTO, http://www.acronymgeek.com/XTO (optional description here) (as of Feb. 14, 2012, 19:26). |
| AMA | XTO. Acronym Geek. February 14, 2012, 19:26. Available at: http://www.acronymgeek.com/XTO. Accessed February 14, 2012, 19:26. |