| APA | SDR. (2012, February 14). In Acronym Geek. Retrieved 11:39, February 14, 2012, from http://www.acronymgeek.com/SDR |
| MLA | "SDR." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/SDR>. |
| MHRA | 'SDR', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/SDR> [accessed 14 February 2012] |
| Chicago | "SDR", http://www.acronymgeek.com/SDR (accessed February 14, 2012). |
| CBE/CSE | SDR [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/SDR. |
| Bluebook | SDR, http://www.acronymgeek.com/SDR (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SDR, http://www.acronymgeek.com/SDR (optional description here) (as of Feb. 14, 2012, 11:39). |
| AMA | SDR. Acronym Geek. February 14, 2012, 11:39. Available at: http://www.acronymgeek.com/SDR. Accessed February 14, 2012, 11:39. |