| APA | PDDM. (2012, February 15). In Acronym Geek. Retrieved 22:59, February 15, 2012, from http://www.acronymgeek.com/PDDM |
| MLA | "PDDM." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PDDM>. |
| MHRA | 'PDDM', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PDDM> [accessed 15 February 2012] |
| Chicago | "PDDM", http://www.acronymgeek.com/PDDM (accessed February 15, 2012). |
| CBE/CSE | PDDM [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PDDM. |
| Bluebook | PDDM, http://www.acronymgeek.com/PDDM (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PDDM, http://www.acronymgeek.com/PDDM (optional description here) (as of Feb. 15, 2012, 22:59). |
| AMA | PDDM. Acronym Geek. February 15, 2012, 22:59. Available at: http://www.acronymgeek.com/PDDM. Accessed February 15, 2012, 22:59. |