| APA | PNE. (2012, February 15). In Acronym Geek. Retrieved 03:28, February 15, 2012, from http://www.acronymgeek.com/PNE |
| MLA | "PNE." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/PNE>. |
| MHRA | 'PNE', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/PNE> [accessed 15 February 2012] |
| Chicago | "PNE", http://www.acronymgeek.com/PNE (accessed February 15, 2012). |
| CBE/CSE | PNE [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/PNE. |
| Bluebook | PNE, http://www.acronymgeek.com/PNE (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PNE, http://www.acronymgeek.com/PNE (optional description here) (as of Feb. 15, 2012, 03:28). |
| AMA | PNE. Acronym Geek. February 15, 2012, 03:28. Available at: http://www.acronymgeek.com/PNE. Accessed February 15, 2012, 03:28. |