| APA | NPOE. (2012, February 12). In Acronym Geek. Retrieved 07:21, February 12, 2012, from http://www.acronymgeek.com/NPOE |
| MLA | "NPOE." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/NPOE>. |
| MHRA | 'NPOE', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/NPOE> [accessed 12 February 2012] |
| Chicago | "NPOE", http://www.acronymgeek.com/NPOE (accessed February 12, 2012). |
| CBE/CSE | NPOE [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/NPOE. |
| Bluebook | NPOE, http://www.acronymgeek.com/NPOE (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPOE, http://www.acronymgeek.com/NPOE (optional description here) (as of Feb. 12, 2012, 07:21). |
| AMA | NPOE. Acronym Geek. February 12, 2012, 07:21. Available at: http://www.acronymgeek.com/NPOE. Accessed February 12, 2012, 07:21. |