| APA | GBKU. (2012, February 17). In Acronym Geek. Retrieved 01:51, February 17, 2012, from http://www.acronymgeek.com/GBKU |
| MLA | "GBKU." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/GBKU>. |
| MHRA | 'GBKU', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/GBKU> [accessed 17 February 2012] |
| Chicago | "GBKU", http://www.acronymgeek.com/GBKU (accessed February 17, 2012). |
| CBE/CSE | GBKU [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/GBKU. |
| Bluebook | GBKU, http://www.acronymgeek.com/GBKU (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GBKU, http://www.acronymgeek.com/GBKU (optional description here) (as of Feb. 17, 2012, 01:51). |
| AMA | GBKU. Acronym Geek. February 17, 2012, 01:51. Available at: http://www.acronymgeek.com/GBKU. Accessed February 17, 2012, 01:51. |