| APA | GTI. (2012, February 10). In Acronym Geek. Retrieved 16:45, February 10, 2012, from http://www.acronymgeek.com/GTI |
| MLA | "GTI." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/GTI>. |
| MHRA | 'GTI', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/GTI> [accessed 10 February 2012] |
| Chicago | "GTI", http://www.acronymgeek.com/GTI (accessed February 10, 2012). |
| CBE/CSE | GTI [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/GTI. |
| Bluebook | GTI, http://www.acronymgeek.com/GTI (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GTI, http://www.acronymgeek.com/GTI (optional description here) (as of Feb. 10, 2012, 16:45). |
| AMA | GTI. Acronym Geek. February 10, 2012, 16:45. Available at: http://www.acronymgeek.com/GTI. Accessed February 10, 2012, 16:45. |