| APA | NPOU. (2012, February 16). In Acronym Geek. Retrieved 11:06, February 16, 2012, from http://www.acronymgeek.com/NPOU |
| MLA | "NPOU." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/NPOU>. |
| MHRA | 'NPOU', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/NPOU> [accessed 16 February 2012] |
| Chicago | "NPOU", http://www.acronymgeek.com/NPOU (accessed February 16, 2012). |
| CBE/CSE | NPOU [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/NPOU. |
| Bluebook | NPOU, http://www.acronymgeek.com/NPOU (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPOU, http://www.acronymgeek.com/NPOU (optional description here) (as of Feb. 16, 2012, 11:06). |
| AMA | NPOU. Acronym Geek. February 16, 2012, 11:06. Available at: http://www.acronymgeek.com/NPOU. Accessed February 16, 2012, 11:06. |