| APA | GCGM. (2012, February 16). In Acronym Geek. Retrieved 11:23, February 16, 2012, from http://www.acronymgeek.com/GCGM |
| MLA | "GCGM." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/GCGM>. |
| MHRA | 'GCGM', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/GCGM> [accessed 16 February 2012] |
| Chicago | "GCGM", http://www.acronymgeek.com/GCGM (accessed February 16, 2012). |
| CBE/CSE | GCGM [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/GCGM. |
| Bluebook | GCGM, http://www.acronymgeek.com/GCGM (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GCGM, http://www.acronymgeek.com/GCGM (optional description here) (as of Feb. 16, 2012, 11:23). |
| AMA | GCGM. Acronym Geek. February 16, 2012, 11:23. Available at: http://www.acronymgeek.com/GCGM. Accessed February 16, 2012, 11:23. |