| APA | GBTU. (2012, February 16). In Acronym Geek. Retrieved 02:45, February 16, 2012, from http://www.acronymgeek.com/GBTU |
| MLA | "GBTU." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/GBTU>. |
| MHRA | 'GBTU', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/GBTU> [accessed 16 February 2012] |
| Chicago | "GBTU", http://www.acronymgeek.com/GBTU (accessed February 16, 2012). |
| CBE/CSE | GBTU [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/GBTU. |
| Bluebook | GBTU, http://www.acronymgeek.com/GBTU (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GBTU, http://www.acronymgeek.com/GBTU (optional description here) (as of Feb. 16, 2012, 02:45). |
| AMA | GBTU. Acronym Geek. February 16, 2012, 02:45. Available at: http://www.acronymgeek.com/GBTU. Accessed February 16, 2012, 02:45. |