| APA | HXI. (2012, February 14). In Acronym Geek. Retrieved 19:13, February 14, 2012, from http://www.acronymgeek.com/HXI |
| MLA | "HXI." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/HXI>. |
| MHRA | 'HXI', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/HXI> [accessed 14 February 2012] |
| Chicago | "HXI", http://www.acronymgeek.com/HXI (accessed February 14, 2012). |
| CBE/CSE | HXI [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/HXI. |
| Bluebook | HXI, http://www.acronymgeek.com/HXI (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HXI, http://www.acronymgeek.com/HXI (optional description here) (as of Feb. 14, 2012, 19:13). |
| AMA | HXI. Acronym Geek. February 14, 2012, 19:13. Available at: http://www.acronymgeek.com/HXI. Accessed February 14, 2012, 19:13. |