| APA | PNDD. (2012, February 15). In Acronym Geek. Retrieved 04:30, February 15, 2012, from http://www.acronymgeek.com/PNDD |
| MLA | "PNDD." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PNDD>. |
| MHRA | 'PNDD', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PNDD> [accessed 15 February 2012] |
| Chicago | "PNDD", http://www.acronymgeek.com/PNDD (accessed February 15, 2012). |
| CBE/CSE | PNDD [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PNDD. |
| Bluebook | PNDD, http://www.acronymgeek.com/PNDD (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PNDD, http://www.acronymgeek.com/PNDD (optional description here) (as of Feb. 15, 2012, 04:30). |
| AMA | PNDD. Acronym Geek. February 15, 2012, 04:30. Available at: http://www.acronymgeek.com/PNDD. Accessed February 15, 2012, 04:30. |