| APA | GBL. (2012, February 10). In Acronym Geek. Retrieved 17:12, February 10, 2012, from http://www.acronymgeek.com/GBL |
| MLA | "GBL." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/GBL>. |
| MHRA | 'GBL', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/GBL> [accessed 10 February 2012] |
| Chicago | "GBL", http://www.acronymgeek.com/GBL (accessed February 10, 2012). |
| CBE/CSE | GBL [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/GBL. |
| Bluebook | GBL, http://www.acronymgeek.com/GBL (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GBL, http://www.acronymgeek.com/GBL (optional description here) (as of Feb. 10, 2012, 17:12). |
| AMA | GBL. Acronym Geek. February 10, 2012, 17:12. Available at: http://www.acronymgeek.com/GBL. Accessed February 10, 2012, 17:12. |