| APA | NPIW. (2012, February 16). In Acronym Geek. Retrieved 17:36, February 16, 2012, from http://www.acronymgeek.com/NPIW |
| MLA | "NPIW." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/NPIW>. |
| MHRA | 'NPIW', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/NPIW> [accessed 16 February 2012] |
| Chicago | "NPIW", http://www.acronymgeek.com/NPIW (accessed February 16, 2012). |
| CBE/CSE | NPIW [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/NPIW. |
| Bluebook | NPIW, http://www.acronymgeek.com/NPIW (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NPIW, http://www.acronymgeek.com/NPIW (optional description here) (as of Feb. 16, 2012, 17:36). |
| AMA | NPIW. Acronym Geek. February 16, 2012, 17:36. Available at: http://www.acronymgeek.com/NPIW. Accessed February 16, 2012, 17:36. |