| APA | D40. (2012, February 11). In Acronym Geek. Retrieved 22:53, February 11, 2012, from http://www.acronymgeek.com/D40 |
| MLA | "D40." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/D40>. |
| MHRA | 'D40', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/D40> [accessed 11 February 2012] |
| Chicago | "D40", http://www.acronymgeek.com/D40 (accessed February 11, 2012). |
| CBE/CSE | D40 [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/D40. |
| Bluebook | D40, http://www.acronymgeek.com/D40 (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, D40, http://www.acronymgeek.com/D40 (optional description here) (as of Feb. 11, 2012, 22:53). |
| AMA | D40. Acronym Geek. February 11, 2012, 22:53. Available at: http://www.acronymgeek.com/D40. Accessed February 11, 2012, 22:53. |