| APA | GTD. (2012, February 9). In Acronym Geek. Retrieved 21:05, February 9, 2012, from http://www.acronymgeek.com/GTD |
| MLA | "GTD." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/GTD>. |
| MHRA | 'GTD', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/GTD> [accessed 9 February 2012] |
| Chicago | "GTD", http://www.acronymgeek.com/GTD (accessed February 9, 2012). |
| CBE/CSE | GTD [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/GTD. |
| Bluebook | GTD, http://www.acronymgeek.com/GTD (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, GTD, http://www.acronymgeek.com/GTD (optional description here) (as of Feb. 9, 2012, 21:05). |
| AMA | GTD. Acronym Geek. February 9, 2012, 21:05. Available at: http://www.acronymgeek.com/GTD. Accessed February 9, 2012, 21:05. |