| APA | GTK. (2012, February 14). In Acronym Geek. Retrieved 04:31, February 14, 2012, from http://www.acronymgeek.com/GTK |
| MLA | "GTK." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/GTK>. |
| MHRA | 'GTK', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/GTK> [accessed 14 February 2012] |
| Chicago | "GTK", http://www.acronymgeek.com/GTK (accessed February 14, 2012). |
| CBE/CSE | GTK [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/GTK. |
| Bluebook | GTK, http://www.acronymgeek.com/GTK (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GTK, http://www.acronymgeek.com/GTK (optional description here) (as of Feb. 14, 2012, 04:31). |
| AMA | GTK. Acronym Geek. February 14, 2012, 04:31. Available at: http://www.acronymgeek.com/GTK. Accessed February 14, 2012, 04:31. |