| APA | SED. (2012, February 9). In Acronym Geek. Retrieved 19:01, February 9, 2012, from http://www.acronymgeek.com/SED |
| MLA | "SED." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/SED>. |
| MHRA | 'SED', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/SED> [accessed 9 February 2012] |
| Chicago | "SED", http://www.acronymgeek.com/SED (accessed February 9, 2012). |
| CBE/CSE | SED [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/SED. |
| Bluebook | SED, http://www.acronymgeek.com/SED (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SED, http://www.acronymgeek.com/SED (optional description here) (as of Feb. 9, 2012, 19:01). |
| AMA | SED. Acronym Geek. February 9, 2012, 19:01. Available at: http://www.acronymgeek.com/SED. Accessed February 9, 2012, 19:01. |