| APA | GBG. (2012, February 14). In Acronym Geek. Retrieved 08:03, February 14, 2012, from http://www.acronymgeek.com/GBG |
| MLA | "GBG." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/GBG>. |
| MHRA | 'GBG', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/GBG> [accessed 14 February 2012] |
| Chicago | "GBG", http://www.acronymgeek.com/GBG (accessed February 14, 2012). |
| CBE/CSE | GBG [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/GBG. |
| Bluebook | GBG, http://www.acronymgeek.com/GBG (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GBG, http://www.acronymgeek.com/GBG (optional description here) (as of Feb. 14, 2012, 08:03). |
| AMA | GBG. Acronym Geek. February 14, 2012, 08:03. Available at: http://www.acronymgeek.com/GBG. Accessed February 14, 2012, 08:03. |