| APA | GPZC. (2012, February 16). In Acronym Geek. Retrieved 07:33, February 16, 2012, from http://www.acronymgeek.com/GPZC |
| MLA | "GPZC." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/GPZC>. |
| MHRA | 'GPZC', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/GPZC> [accessed 16 February 2012] |
| Chicago | "GPZC", http://www.acronymgeek.com/GPZC (accessed February 16, 2012). |
| CBE/CSE | GPZC [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/GPZC. |
| Bluebook | GPZC, http://www.acronymgeek.com/GPZC (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GPZC, http://www.acronymgeek.com/GPZC (optional description here) (as of Feb. 16, 2012, 07:33). |
| AMA | GPZC. Acronym Geek. February 16, 2012, 07:33. Available at: http://www.acronymgeek.com/GPZC. Accessed February 16, 2012, 07:33. |