| APA | NPNB. (2012, February 14). In Acronym Geek. Retrieved 13:57, February 14, 2012, from http://www.acronymgeek.com/NPNB |
| MLA | "NPNB." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/NPNB>. |
| MHRA | 'NPNB', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/NPNB> [accessed 14 February 2012] |
| Chicago | "NPNB", http://www.acronymgeek.com/NPNB (accessed February 14, 2012). |
| CBE/CSE | NPNB [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/NPNB. |
| Bluebook | NPNB, http://www.acronymgeek.com/NPNB (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPNB, http://www.acronymgeek.com/NPNB (optional description here) (as of Feb. 14, 2012, 13:57). |
| AMA | NPNB. Acronym Geek. February 14, 2012, 13:57. Available at: http://www.acronymgeek.com/NPNB. Accessed February 14, 2012, 13:57. |