| APA | NPOP. (2012, February 12). In Acronym Geek. Retrieved 10:41, February 12, 2012, from http://www.acronymgeek.com/NPOP |
| MLA | "NPOP." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/NPOP>. |
| MHRA | 'NPOP', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/NPOP> [accessed 12 February 2012] |
| Chicago | "NPOP", http://www.acronymgeek.com/NPOP (accessed February 12, 2012). |
| CBE/CSE | NPOP [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/NPOP. |
| Bluebook | NPOP, http://www.acronymgeek.com/NPOP (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPOP, http://www.acronymgeek.com/NPOP (optional description here) (as of Feb. 12, 2012, 10:41). |
| AMA | NPOP. Acronym Geek. February 12, 2012, 10:41. Available at: http://www.acronymgeek.com/NPOP. Accessed February 12, 2012, 10:41. |