| APA | GCBK. (2012, February 15). In Acronym Geek. Retrieved 10:36, February 15, 2012, from http://www.acronymgeek.com/GCBK |
| MLA | "GCBK." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/GCBK>. |
| MHRA | 'GCBK', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/GCBK> [accessed 15 February 2012] |
| Chicago | "GCBK", http://www.acronymgeek.com/GCBK (accessed February 15, 2012). |
| CBE/CSE | GCBK [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/GCBK. |
| Bluebook | GCBK, http://www.acronymgeek.com/GCBK (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GCBK, http://www.acronymgeek.com/GCBK (optional description here) (as of Feb. 15, 2012, 10:36). |
| AMA | GCBK. Acronym Geek. February 15, 2012, 10:36. Available at: http://www.acronymgeek.com/GCBK. Accessed February 15, 2012, 10:36. |