| APA | GTEI. (2012, February 16). In Acronym Geek. Retrieved 14:55, February 16, 2012, from http://www.acronymgeek.com/GTEI |
| MLA | "GTEI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/GTEI>. |
| MHRA | 'GTEI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/GTEI> [accessed 16 February 2012] |
| Chicago | "GTEI", http://www.acronymgeek.com/GTEI (accessed February 16, 2012). |
| CBE/CSE | GTEI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/GTEI. |
| Bluebook | GTEI, http://www.acronymgeek.com/GTEI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GTEI, http://www.acronymgeek.com/GTEI (optional description here) (as of Feb. 16, 2012, 14:55). |
| AMA | GTEI. Acronym Geek. February 16, 2012, 14:55. Available at: http://www.acronymgeek.com/GTEI. Accessed February 16, 2012, 14:55. |