| APA | DDR. (2012, February 14). In Acronym Geek. Retrieved 10:04, February 14, 2012, from http://www.acronymgeek.com/DDR |
| MLA | "DDR." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/DDR>. |
| MHRA | 'DDR', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/DDR> [accessed 14 February 2012] |
| Chicago | "DDR", http://www.acronymgeek.com/DDR (accessed February 14, 2012). |
| CBE/CSE | DDR [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/DDR. |
| Bluebook | DDR, http://www.acronymgeek.com/DDR (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DDR, http://www.acronymgeek.com/DDR (optional description here) (as of Feb. 14, 2012, 10:04). |
| AMA | DDR. Acronym Geek. February 14, 2012, 10:04. Available at: http://www.acronymgeek.com/DDR. Accessed February 14, 2012, 10:04. |