| APA | GCGI. (2012, February 15). In Acronym Geek. Retrieved 05:36, February 15, 2012, from http://www.acronymgeek.com/GCGI |
| MLA | "GCGI." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/GCGI>. |
| MHRA | 'GCGI', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/GCGI> [accessed 15 February 2012] |
| Chicago | "GCGI", http://www.acronymgeek.com/GCGI (accessed February 15, 2012). |
| CBE/CSE | GCGI [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/GCGI. |
| Bluebook | GCGI, http://www.acronymgeek.com/GCGI (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GCGI, http://www.acronymgeek.com/GCGI (optional description here) (as of Feb. 15, 2012, 05:36). |
| AMA | GCGI. Acronym Geek. February 15, 2012, 05:36. Available at: http://www.acronymgeek.com/GCGI. Accessed February 15, 2012, 05:36. |