| APA | GPWO. (2012, February 15). In Acronym Geek. Retrieved 18:43, February 15, 2012, from http://www.acronymgeek.com/GPWO |
| MLA | "GPWO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/GPWO>. |
| MHRA | 'GPWO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/GPWO> [accessed 15 February 2012] |
| Chicago | "GPWO", http://www.acronymgeek.com/GPWO (accessed February 15, 2012). |
| CBE/CSE | GPWO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/GPWO. |
| Bluebook | GPWO, http://www.acronymgeek.com/GPWO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GPWO, http://www.acronymgeek.com/GPWO (optional description here) (as of Feb. 15, 2012, 18:43). |
| AMA | GPWO. Acronym Geek. February 15, 2012, 18:43. Available at: http://www.acronymgeek.com/GPWO. Accessed February 15, 2012, 18:43. |