| APA | GCG. (2012, February 11). In Acronym Geek. Retrieved 22:40, February 11, 2012, from http://www.acronymgeek.com/GCG |
| MLA | "GCG." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/GCG>. |
| MHRA | 'GCG', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/GCG> [accessed 11 February 2012] |
| Chicago | "GCG", http://www.acronymgeek.com/GCG (accessed February 11, 2012). |
| CBE/CSE | GCG [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/GCG. |
| Bluebook | GCG, http://www.acronymgeek.com/GCG (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GCG, http://www.acronymgeek.com/GCG (optional description here) (as of Feb. 11, 2012, 22:40). |
| AMA | GCG. Acronym Geek. February 11, 2012, 22:40. Available at: http://www.acronymgeek.com/GCG. Accessed February 11, 2012, 22:40. |