| APA | SDD. (2012, February 14). In Acronym Geek. Retrieved 10:01, February 14, 2012, from http://www.acronymgeek.com/SDD |
| MLA | "SDD." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/SDD>. |
| MHRA | 'SDD', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/SDD> [accessed 14 February 2012] |
| Chicago | "SDD", http://www.acronymgeek.com/SDD (accessed February 14, 2012). |
| CBE/CSE | SDD [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/SDD. |
| Bluebook | SDD, http://www.acronymgeek.com/SDD (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SDD, http://www.acronymgeek.com/SDD (optional description here) (as of Feb. 14, 2012, 10:01). |
| AMA | SDD. Acronym Geek. February 14, 2012, 10:01. Available at: http://www.acronymgeek.com/SDD. Accessed February 14, 2012, 10:01. |