| APA | GBM. (2012, February 8). In Acronym Geek. Retrieved 11:22, February 8, 2012, from http://www.acronymgeek.com/GBM |
| MLA | "GBM." Acronym Geek. (2012). Acronym Geek. 8 Feb 2012 <http://www.acronymgeek.com/GBM>. |
| MHRA | 'GBM', Acronym Geek, 8 February 2012, <http://www.acronymgeek.com/GBM> [accessed 8 February 2012] |
| Chicago | "GBM", http://www.acronymgeek.com/GBM (accessed February 8, 2012). |
| CBE/CSE | GBM [Internet]. Acronym Geek; 2012 Feb 8 [cited 2012 Feb 8]. Available from: http://www.acronymgeek.com/GBM. |
| Bluebook | GBM, http://www.acronymgeek.com/GBM (last visited February 8, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GBM, http://www.acronymgeek.com/GBM (optional description here) (as of Feb. 8, 2012, 11:22). |
| AMA | GBM. Acronym Geek. February 8, 2012, 11:22. Available at: http://www.acronymgeek.com/GBM. Accessed February 8, 2012, 11:22. |