| APA | XHO. (2012, February 14). In Acronym Geek. Retrieved 07:50, February 14, 2012, from http://www.acronymgeek.com/XHO |
| MLA | "XHO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/XHO>. |
| MHRA | 'XHO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/XHO> [accessed 14 February 2012] |
| Chicago | "XHO", http://www.acronymgeek.com/XHO (accessed February 14, 2012). |
| CBE/CSE | XHO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/XHO. |
| Bluebook | XHO, http://www.acronymgeek.com/XHO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XHO, http://www.acronymgeek.com/XHO (optional description here) (as of Feb. 14, 2012, 07:50). |
| AMA | XHO. Acronym Geek. February 14, 2012, 07:50. Available at: http://www.acronymgeek.com/XHO. Accessed February 14, 2012, 07:50. |