| APA | TDO. (2012, February 14). In Acronym Geek. Retrieved 09:26, February 14, 2012, from http://www.acronymgeek.com/TDO |
| MLA | "TDO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/TDO>. |
| MHRA | 'TDO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/TDO> [accessed 14 February 2012] |
| Chicago | "TDO", http://www.acronymgeek.com/TDO (accessed February 14, 2012). |
| CBE/CSE | TDO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/TDO. |
| Bluebook | TDO, http://www.acronymgeek.com/TDO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, TDO, http://www.acronymgeek.com/TDO (optional description here) (as of Feb. 14, 2012, 09:26). |
| AMA | TDO. Acronym Geek. February 14, 2012, 09:26. Available at: http://www.acronymgeek.com/TDO. Accessed February 14, 2012, 09:26. |