| APA | ZIX. (2012, February 14). In Acronym Geek. Retrieved 02:34, February 14, 2012, from http://www.acronymgeek.com/ZIX |
| MLA | "ZIX." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ZIX>. |
| MHRA | 'ZIX', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ZIX> [accessed 14 February 2012] |
| Chicago | "ZIX", http://www.acronymgeek.com/ZIX (accessed February 14, 2012). |
| CBE/CSE | ZIX [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ZIX. |
| Bluebook | ZIX, http://www.acronymgeek.com/ZIX (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZIX, http://www.acronymgeek.com/ZIX (optional description here) (as of Feb. 14, 2012, 02:34). |
| AMA | ZIX. Acronym Geek. February 14, 2012, 02:34. Available at: http://www.acronymgeek.com/ZIX. Accessed February 14, 2012, 02:34. |