| APA | MDD. (2012, February 14). In Acronym Geek. Retrieved 09:02, February 14, 2012, from http://www.acronymgeek.com/MDD |
| MLA | "MDD." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/MDD>. |
| MHRA | 'MDD', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/MDD> [accessed 14 February 2012] |
| Chicago | "MDD", http://www.acronymgeek.com/MDD (accessed February 14, 2012). |
| CBE/CSE | MDD [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/MDD. |
| Bluebook | MDD, http://www.acronymgeek.com/MDD (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, MDD, http://www.acronymgeek.com/MDD (optional description here) (as of Feb. 14, 2012, 09:02). |
| AMA | MDD. Acronym Geek. February 14, 2012, 09:02. Available at: http://www.acronymgeek.com/MDD. Accessed February 14, 2012, 09:02. |