| APA | D2. (2012, February 14). In Acronym Geek. Retrieved 06:10, February 14, 2012, from http://www.acronymgeek.com/D2 |
| MLA | "D2." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/D2>. |
| MHRA | 'D2', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/D2> [accessed 14 February 2012] |
| Chicago | "D2", http://www.acronymgeek.com/D2 (accessed February 14, 2012). |
| CBE/CSE | D2 [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/D2. |
| Bluebook | D2, http://www.acronymgeek.com/D2 (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, D2, http://www.acronymgeek.com/D2 (optional description here) (as of Feb. 14, 2012, 06:10). |
| AMA | D2. Acronym Geek. February 14, 2012, 06:10. Available at: http://www.acronymgeek.com/D2. Accessed February 14, 2012, 06:10. |