| APA | HX. (2012, February 8). In Acronym Geek. Retrieved 19:37, February 8, 2012, from http://www.acronymgeek.com/HX |
| MLA | "HX." Acronym Geek. (2012). Acronym Geek. 8 Feb 2012 <http://www.acronymgeek.com/HX>. |
| MHRA | 'HX', Acronym Geek, 8 February 2012, <http://www.acronymgeek.com/HX> [accessed 8 February 2012] |
| Chicago | "HX", http://www.acronymgeek.com/HX (accessed February 8, 2012). |
| CBE/CSE | HX [Internet]. Acronym Geek; 2012 Feb 8 [cited 2012 Feb 8]. Available from: http://www.acronymgeek.com/HX. |
| Bluebook | HX, http://www.acronymgeek.com/HX (last visited February 8, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HX, http://www.acronymgeek.com/HX (optional description here) (as of Feb. 8, 2012, 19:37). |
| AMA | HX. Acronym Geek. February 8, 2012, 19:37. Available at: http://www.acronymgeek.com/HX. Accessed February 8, 2012, 19:37. |