| APA | NPD. (2012, February 14). In Acronym Geek. Retrieved 07:30, February 14, 2012, from http://www.acronymgeek.com/NPD |
| MLA | "NPD." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/NPD>. |
| MHRA | 'NPD', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/NPD> [accessed 14 February 2012] |
| Chicago | "NPD", http://www.acronymgeek.com/NPD (accessed February 14, 2012). |
| CBE/CSE | NPD [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/NPD. |
| Bluebook | NPD, http://www.acronymgeek.com/NPD (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPD, http://www.acronymgeek.com/NPD (optional description here) (as of Feb. 14, 2012, 07:30). |
| AMA | NPD. Acronym Geek. February 14, 2012, 07:30. Available at: http://www.acronymgeek.com/NPD. Accessed February 14, 2012, 07:30. |