| APA | GPZA. (2012, February 16). In Acronym Geek. Retrieved 21:35, February 16, 2012, from http://www.acronymgeek.com/GPZA |
| MLA | "GPZA." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/GPZA>. |
| MHRA | 'GPZA', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/GPZA> [accessed 16 February 2012] |
| Chicago | "GPZA", http://www.acronymgeek.com/GPZA (accessed February 16, 2012). |
| CBE/CSE | GPZA [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/GPZA. |
| Bluebook | GPZA, http://www.acronymgeek.com/GPZA (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GPZA, http://www.acronymgeek.com/GPZA (optional description here) (as of Feb. 16, 2012, 21:35). |
| AMA | GPZA. Acronym Geek. February 16, 2012, 21:35. Available at: http://www.acronymgeek.com/GPZA. Accessed February 16, 2012, 21:35. |