| APA | WTDU. (2012, February 17). In Acronym Geek. Retrieved 07:45, February 17, 2012, from http://www.acronymgeek.com/WTDU |
| MLA | "WTDU." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/WTDU>. |
| MHRA | 'WTDU', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/WTDU> [accessed 17 February 2012] |
| Chicago | "WTDU", http://www.acronymgeek.com/WTDU (accessed February 17, 2012). |
| CBE/CSE | WTDU [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/WTDU. |
| Bluebook | WTDU, http://www.acronymgeek.com/WTDU (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, WTDU, http://www.acronymgeek.com/WTDU (optional description here) (as of Feb. 17, 2012, 07:45). |
| AMA | WTDU. Acronym Geek. February 17, 2012, 07:45. Available at: http://www.acronymgeek.com/WTDU. Accessed February 17, 2012, 07:45. |