| APA | D.4. (2012, February 15). In Acronym Geek. Retrieved 03:31, February 15, 2012, from http://www.acronymgeek.com/D.4 |
| MLA | "D.4." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/D.4>. |
| MHRA | 'D.4', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/D.4> [accessed 15 February 2012] |
| Chicago | "D.4", http://www.acronymgeek.com/D.4 (accessed February 15, 2012). |
| CBE/CSE | D.4 [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/D.4. |
| Bluebook | D.4, http://www.acronymgeek.com/D.4 (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, D.4, http://www.acronymgeek.com/D.4 (optional description here) (as of Feb. 15, 2012, 03:31). |
| AMA | D.4. Acronym Geek. February 15, 2012, 03:31. Available at: http://www.acronymgeek.com/D.4. Accessed February 15, 2012, 03:31. |