| APA | HXK. (2012, February 13). In Acronym Geek. Retrieved 23:09, February 13, 2012, from http://www.acronymgeek.com/HXK |
| MLA | "HXK." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/HXK>. |
| MHRA | 'HXK', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/HXK> [accessed 13 February 2012] |
| Chicago | "HXK", http://www.acronymgeek.com/HXK (accessed February 13, 2012). |
| CBE/CSE | HXK [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/HXK. |
| Bluebook | HXK, http://www.acronymgeek.com/HXK (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HXK, http://www.acronymgeek.com/HXK (optional description here) (as of Feb. 13, 2012, 23:09). |
| AMA | HXK. Acronym Geek. February 13, 2012, 23:09. Available at: http://www.acronymgeek.com/HXK. Accessed February 13, 2012, 23:09. |