| APA | GPZB. (2012, February 15). In Acronym Geek. Retrieved 19:13, February 15, 2012, from http://www.acronymgeek.com/GPZB |
| MLA | "GPZB." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/GPZB>. |
| MHRA | 'GPZB', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/GPZB> [accessed 15 February 2012] |
| Chicago | "GPZB", http://www.acronymgeek.com/GPZB (accessed February 15, 2012). |
| CBE/CSE | GPZB [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/GPZB. |
| Bluebook | GPZB, http://www.acronymgeek.com/GPZB (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GPZB, http://www.acronymgeek.com/GPZB (optional description here) (as of Feb. 15, 2012, 19:13). |
| AMA | GPZB. Acronym Geek. February 15, 2012, 19:13. Available at: http://www.acronymgeek.com/GPZB. Accessed February 15, 2012, 19:13. |