| APA | DDK. (2012, February 10). In Acronym Geek. Retrieved 10:45, February 10, 2012, from http://www.acronymgeek.com/DDK |
| MLA | "DDK." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/DDK>. |
| MHRA | 'DDK', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/DDK> [accessed 10 February 2012] |
| Chicago | "DDK", http://www.acronymgeek.com/DDK (accessed February 10, 2012). |
| CBE/CSE | DDK [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/DDK. |
| Bluebook | DDK, http://www.acronymgeek.com/DDK (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DDK, http://www.acronymgeek.com/DDK (optional description here) (as of Feb. 10, 2012, 10:45). |
| AMA | DDK. Acronym Geek. February 10, 2012, 10:45. Available at: http://www.acronymgeek.com/DDK. Accessed February 10, 2012, 10:45. |