| APA | NPDC. (2012, February 16). In Acronym Geek. Retrieved 12:24, February 16, 2012, from http://www.acronymgeek.com/NPDC |
| MLA | "NPDC." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/NPDC>. |
| MHRA | 'NPDC', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/NPDC> [accessed 16 February 2012] |
| Chicago | "NPDC", http://www.acronymgeek.com/NPDC (accessed February 16, 2012). |
| CBE/CSE | NPDC [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/NPDC. |
| Bluebook | NPDC, http://www.acronymgeek.com/NPDC (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPDC, http://www.acronymgeek.com/NPDC (optional description here) (as of Feb. 16, 2012, 12:24). |
| AMA | NPDC. Acronym Geek. February 16, 2012, 12:24. Available at: http://www.acronymgeek.com/NPDC. Accessed February 16, 2012, 12:24. |