| APA | HX. (2012, February 11). In Acronym Geek. Retrieved 21:50, February 11, 2012, from http://www.acronymgeek.com/HX |
| MLA | "HX." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/HX>. |
| MHRA | 'HX', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/HX> [accessed 11 February 2012] |
| Chicago | "HX", http://www.acronymgeek.com/HX (accessed February 11, 2012). |
| CBE/CSE | HX [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/HX. |
| Bluebook | HX, http://www.acronymgeek.com/HX (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HX, http://www.acronymgeek.com/HX (optional description here) (as of Feb. 11, 2012, 21:50). |
| AMA | HX. Acronym Geek. February 11, 2012, 21:50. Available at: http://www.acronymgeek.com/HX. Accessed February 11, 2012, 21:50. |