| APA | 9D. (2012, February 10). In Acronym Geek. Retrieved 10:35, February 10, 2012, from http://www.acronymgeek.com/9D |
| MLA | "9D." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/9D>. |
| MHRA | '9D', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/9D> [accessed 10 February 2012] |
| Chicago | "9D", http://www.acronymgeek.com/9D (accessed February 10, 2012). |
| CBE/CSE | 9D [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/9D. |
| Bluebook | 9D, http://www.acronymgeek.com/9D (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 9D, http://www.acronymgeek.com/9D (optional description here) (as of Feb. 10, 2012, 10:35). |
| AMA | 9D. Acronym Geek. February 10, 2012, 10:35. Available at: http://www.acronymgeek.com/9D. Accessed February 10, 2012, 10:35. |