| APA | XTPO. (2012, February 14). In Acronym Geek. Retrieved 17:32, February 14, 2012, from http://www.acronymgeek.com/XTPO |
| MLA | "XTPO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/XTPO>. |
| MHRA | 'XTPO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/XTPO> [accessed 14 February 2012] |
| Chicago | "XTPO", http://www.acronymgeek.com/XTPO (accessed February 14, 2012). |
| CBE/CSE | XTPO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/XTPO. |
| Bluebook | XTPO, http://www.acronymgeek.com/XTPO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XTPO, http://www.acronymgeek.com/XTPO (optional description here) (as of Feb. 14, 2012, 17:32). |
| AMA | XTPO. Acronym Geek. February 14, 2012, 17:32. Available at: http://www.acronymgeek.com/XTPO. Accessed February 14, 2012, 17:32. |