| APA | NPOL. (2012, February 11). In Acronym Geek. Retrieved 22:04, February 11, 2012, from http://www.acronymgeek.com/NPOL |
| MLA | "NPOL." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/NPOL>. |
| MHRA | 'NPOL', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/NPOL> [accessed 11 February 2012] |
| Chicago | "NPOL", http://www.acronymgeek.com/NPOL (accessed February 11, 2012). |
| CBE/CSE | NPOL [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/NPOL. |
| Bluebook | NPOL, http://www.acronymgeek.com/NPOL (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPOL, http://www.acronymgeek.com/NPOL (optional description here) (as of Feb. 11, 2012, 22:04). |
| AMA | NPOL. Acronym Geek. February 11, 2012, 22:04. Available at: http://www.acronymgeek.com/NPOL. Accessed February 11, 2012, 22:04. |