| APA | GPZS. (2012, February 15). In Acronym Geek. Retrieved 06:43, February 15, 2012, from http://www.acronymgeek.com/GPZS |
| MLA | "GPZS." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/GPZS>. |
| MHRA | 'GPZS', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/GPZS> [accessed 15 February 2012] |
| Chicago | "GPZS", http://www.acronymgeek.com/GPZS (accessed February 15, 2012). |
| CBE/CSE | GPZS [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/GPZS. |
| Bluebook | GPZS, http://www.acronymgeek.com/GPZS (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GPZS, http://www.acronymgeek.com/GPZS (optional description here) (as of Feb. 15, 2012, 06:43). |
| AMA | GPZS. Acronym Geek. February 15, 2012, 06:43. Available at: http://www.acronymgeek.com/GPZS. Accessed February 15, 2012, 06:43. |