| APA | IX. (2012, February 11). In Acronym Geek. Retrieved 21:49, February 11, 2012, from http://www.acronymgeek.com/IX |
| MLA | "IX." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/IX>. |
| MHRA | 'IX', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/IX> [accessed 11 February 2012] |
| Chicago | "IX", http://www.acronymgeek.com/IX (accessed February 11, 2012). |
| CBE/CSE | IX [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/IX. |
| Bluebook | IX, http://www.acronymgeek.com/IX (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, IX, http://www.acronymgeek.com/IX (optional description here) (as of Feb. 11, 2012, 21:49). |
| AMA | IX. Acronym Geek. February 11, 2012, 21:49. Available at: http://www.acronymgeek.com/IX. Accessed February 11, 2012, 21:49. |