| APA | NPE. (2012, February 14). In Acronym Geek. Retrieved 09:16, February 14, 2012, from http://www.acronymgeek.com/NPE |
| MLA | "NPE." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/NPE>. |
| MHRA | 'NPE', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/NPE> [accessed 14 February 2012] |
| Chicago | "NPE", http://www.acronymgeek.com/NPE (accessed February 14, 2012). |
| CBE/CSE | NPE [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/NPE. |
| Bluebook | NPE, http://www.acronymgeek.com/NPE (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPE, http://www.acronymgeek.com/NPE (optional description here) (as of Feb. 14, 2012, 09:16). |
| AMA | NPE. Acronym Geek. February 14, 2012, 09:16. Available at: http://www.acronymgeek.com/NPE. Accessed February 14, 2012, 09:16. |