| APA | NPDH. (2012, February 16). In Acronym Geek. Retrieved 03:15, February 16, 2012, from http://www.acronymgeek.com/NPDH |
| MLA | "NPDH." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/NPDH>. |
| MHRA | 'NPDH', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/NPDH> [accessed 16 February 2012] |
| Chicago | "NPDH", http://www.acronymgeek.com/NPDH (accessed February 16, 2012). |
| CBE/CSE | NPDH [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/NPDH. |
| Bluebook | NPDH, http://www.acronymgeek.com/NPDH (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPDH, http://www.acronymgeek.com/NPDH (optional description here) (as of Feb. 16, 2012, 03:15). |
| AMA | NPDH. Acronym Geek. February 16, 2012, 03:15. Available at: http://www.acronymgeek.com/NPDH. Accessed February 16, 2012, 03:15. |