| APA | NPNF. (2012, February 12). In Acronym Geek. Retrieved 10:14, February 12, 2012, from http://www.acronymgeek.com/NPNF |
| MLA | "NPNF." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/NPNF>. |
| MHRA | 'NPNF', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/NPNF> [accessed 12 February 2012] |
| Chicago | "NPNF", http://www.acronymgeek.com/NPNF (accessed February 12, 2012). |
| CBE/CSE | NPNF [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/NPNF. |
| Bluebook | NPNF, http://www.acronymgeek.com/NPNF (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPNF, http://www.acronymgeek.com/NPNF (optional description here) (as of Feb. 12, 2012, 10:14). |
| AMA | NPNF. Acronym Geek. February 12, 2012, 10:14. Available at: http://www.acronymgeek.com/NPNF. Accessed February 12, 2012, 10:14. |