| APA | GPRK. (2012, February 15). In Acronym Geek. Retrieved 18:16, February 15, 2012, from http://www.acronymgeek.com/GPRK |
| MLA | "GPRK." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/GPRK>. |
| MHRA | 'GPRK', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/GPRK> [accessed 15 February 2012] |
| Chicago | "GPRK", http://www.acronymgeek.com/GPRK (accessed February 15, 2012). |
| CBE/CSE | GPRK [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/GPRK. |
| Bluebook | GPRK, http://www.acronymgeek.com/GPRK (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GPRK, http://www.acronymgeek.com/GPRK (optional description here) (as of Feb. 15, 2012, 18:16). |
| AMA | GPRK. Acronym Geek. February 15, 2012, 18:16. Available at: http://www.acronymgeek.com/GPRK. Accessed February 15, 2012, 18:16. |