| APA | DDD. (2012, February 13). In Acronym Geek. Retrieved 21:05, February 13, 2012, from http://www.acronymgeek.com/DDD |
| MLA | "DDD." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/DDD>. |
| MHRA | 'DDD', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/DDD> [accessed 13 February 2012] |
| Chicago | "DDD", http://www.acronymgeek.com/DDD (accessed February 13, 2012). |
| CBE/CSE | DDD [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/DDD. |
| Bluebook | DDD, http://www.acronymgeek.com/DDD (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DDD, http://www.acronymgeek.com/DDD (optional description here) (as of Feb. 13, 2012, 21:05). |
| AMA | DDD. Acronym Geek. February 13, 2012, 21:05. Available at: http://www.acronymgeek.com/DDD. Accessed February 13, 2012, 21:05. |