| APA | NPDD. (2012, February 16). In Acronym Geek. Retrieved 18:14, February 16, 2012, from http://www.acronymgeek.com/NPDD |
| MLA | "NPDD." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/NPDD>. |
| MHRA | 'NPDD', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/NPDD> [accessed 16 February 2012] |
| Chicago | "NPDD", http://www.acronymgeek.com/NPDD (accessed February 16, 2012). |
| CBE/CSE | NPDD [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/NPDD. |
| Bluebook | NPDD, http://www.acronymgeek.com/NPDD (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPDD, http://www.acronymgeek.com/NPDD (optional description here) (as of Feb. 16, 2012, 18:14). |
| AMA | NPDD. Acronym Geek. February 16, 2012, 18:14. Available at: http://www.acronymgeek.com/NPDD. Accessed February 16, 2012, 18:14. |