| APA | 9S. (2012, February 11). In Acronym Geek. Retrieved 18:06, February 11, 2012, from http://www.acronymgeek.com/9S |
| MLA | "9S." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/9S>. |
| MHRA | '9S', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/9S> [accessed 11 February 2012] |
| Chicago | "9S", http://www.acronymgeek.com/9S (accessed February 11, 2012). |
| CBE/CSE | 9S [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/9S. |
| Bluebook | 9S, http://www.acronymgeek.com/9S (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 9S, http://www.acronymgeek.com/9S (optional description here) (as of Feb. 11, 2012, 18:06). |
| AMA | 9S. Acronym Geek. February 11, 2012, 18:06. Available at: http://www.acronymgeek.com/9S. Accessed February 11, 2012, 18:06. |