| APA | NPP. (2012, February 13). In Acronym Geek. Retrieved 21:12, February 13, 2012, from http://www.acronymgeek.com/NPP |
| MLA | "NPP." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/NPP>. |
| MHRA | 'NPP', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/NPP> [accessed 13 February 2012] |
| Chicago | "NPP", http://www.acronymgeek.com/NPP (accessed February 13, 2012). |
| CBE/CSE | NPP [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/NPP. |
| Bluebook | NPP, http://www.acronymgeek.com/NPP (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPP, http://www.acronymgeek.com/NPP (optional description here) (as of Feb. 13, 2012, 21:12). |
| AMA | NPP. Acronym Geek. February 13, 2012, 21:12. Available at: http://www.acronymgeek.com/NPP. Accessed February 13, 2012, 21:12. |