| APA | NPND. (2012, February 15). In Acronym Geek. Retrieved 06:57, February 15, 2012, from http://www.acronymgeek.com/NPND |
| MLA | "NPND." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/NPND>. |
| MHRA | 'NPND', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/NPND> [accessed 15 February 2012] |
| Chicago | "NPND", http://www.acronymgeek.com/NPND (accessed February 15, 2012). |
| CBE/CSE | NPND [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/NPND. |
| Bluebook | NPND, http://www.acronymgeek.com/NPND (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPND, http://www.acronymgeek.com/NPND (optional description here) (as of Feb. 15, 2012, 06:57). |
| AMA | NPND. Acronym Geek. February 15, 2012, 06:57. Available at: http://www.acronymgeek.com/NPND. Accessed February 15, 2012, 06:57. |