| APA | IX. (2012, February 10). In Acronym Geek. Retrieved 10:39, February 10, 2012, from http://www.acronymgeek.com/IX |
| MLA | "IX." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/IX>. |
| MHRA | 'IX', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/IX> [accessed 10 February 2012] |
| Chicago | "IX", http://www.acronymgeek.com/IX (accessed February 10, 2012). |
| CBE/CSE | IX [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/IX. |
| Bluebook | IX, http://www.acronymgeek.com/IX (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, IX, http://www.acronymgeek.com/IX (optional description here) (as of Feb. 10, 2012, 10:39). |
| AMA | IX. Acronym Geek. February 10, 2012, 10:39. Available at: http://www.acronymgeek.com/IX. Accessed February 10, 2012, 10:39. |