| APA | GGEI. (2012, February 16). In Acronym Geek. Retrieved 08:04, February 16, 2012, from http://www.acronymgeek.com/GGEI |
| MLA | "GGEI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/GGEI>. |
| MHRA | 'GGEI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/GGEI> [accessed 16 February 2012] |
| Chicago | "GGEI", http://www.acronymgeek.com/GGEI (accessed February 16, 2012). |
| CBE/CSE | GGEI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/GGEI. |
| Bluebook | GGEI, http://www.acronymgeek.com/GGEI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GGEI, http://www.acronymgeek.com/GGEI (optional description here) (as of Feb. 16, 2012, 08:04). |
| AMA | GGEI. Acronym Geek. February 16, 2012, 08:04. Available at: http://www.acronymgeek.com/GGEI. Accessed February 16, 2012, 08:04. |