| APA | D4S. (2012, February 11). In Acronym Geek. Retrieved 22:27, February 11, 2012, from http://www.acronymgeek.com/D4S |
| MLA | "D4S." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/D4S>. |
| MHRA | 'D4S', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/D4S> [accessed 11 February 2012] |
| Chicago | "D4S", http://www.acronymgeek.com/D4S (accessed February 11, 2012). |
| CBE/CSE | D4S [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/D4S. |
| Bluebook | D4S, http://www.acronymgeek.com/D4S (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, D4S, http://www.acronymgeek.com/D4S (optional description here) (as of Feb. 11, 2012, 22:27). |
| AMA | D4S. Acronym Geek. February 11, 2012, 22:27. Available at: http://www.acronymgeek.com/D4S. Accessed February 11, 2012, 22:27. |