| APA | GPWI. (2012, February 15). In Acronym Geek. Retrieved 07:37, February 15, 2012, from http://www.acronymgeek.com/GPWI |
| MLA | "GPWI." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/GPWI>. |
| MHRA | 'GPWI', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/GPWI> [accessed 15 February 2012] |
| Chicago | "GPWI", http://www.acronymgeek.com/GPWI (accessed February 15, 2012). |
| CBE/CSE | GPWI [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/GPWI. |
| Bluebook | GPWI, http://www.acronymgeek.com/GPWI (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GPWI, http://www.acronymgeek.com/GPWI (optional description here) (as of Feb. 15, 2012, 07:37). |
| AMA | GPWI. Acronym Geek. February 15, 2012, 07:37. Available at: http://www.acronymgeek.com/GPWI. Accessed February 15, 2012, 07:37. |