| APA | PWI. (2012, February 13). In Acronym Geek. Retrieved 23:53, February 13, 2012, from http://www.acronymgeek.com/PWI |
| MLA | "PWI." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/PWI>. |
| MHRA | 'PWI', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/PWI> [accessed 13 February 2012] |
| Chicago | "PWI", http://www.acronymgeek.com/PWI (accessed February 13, 2012). |
| CBE/CSE | PWI [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/PWI. |
| Bluebook | PWI, http://www.acronymgeek.com/PWI (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PWI, http://www.acronymgeek.com/PWI (optional description here) (as of Feb. 13, 2012, 23:53). |
| AMA | PWI. Acronym Geek. February 13, 2012, 23:53. Available at: http://www.acronymgeek.com/PWI. Accessed February 13, 2012, 23:53. |