| APA | GPCI. (2012, February 16). In Acronym Geek. Retrieved 08:20, February 16, 2012, from http://www.acronymgeek.com/GPCI |
| MLA | "GPCI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/GPCI>. |
| MHRA | 'GPCI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/GPCI> [accessed 16 February 2012] |
| Chicago | "GPCI", http://www.acronymgeek.com/GPCI (accessed February 16, 2012). |
| CBE/CSE | GPCI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/GPCI. |
| Bluebook | GPCI, http://www.acronymgeek.com/GPCI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GPCI, http://www.acronymgeek.com/GPCI (optional description here) (as of Feb. 16, 2012, 08:20). |
| AMA | GPCI. Acronym Geek. February 16, 2012, 08:20. Available at: http://www.acronymgeek.com/GPCI. Accessed February 16, 2012, 08:20. |