| APA | WIDU. (2012, February 17). In Acronym Geek. Retrieved 06:38, February 17, 2012, from http://www.acronymgeek.com/WIDU |
| MLA | "WIDU." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/WIDU>. |
| MHRA | 'WIDU', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/WIDU> [accessed 17 February 2012] |
| Chicago | "WIDU", http://www.acronymgeek.com/WIDU (accessed February 17, 2012). |
| CBE/CSE | WIDU [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/WIDU. |
| Bluebook | WIDU, http://www.acronymgeek.com/WIDU (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, WIDU, http://www.acronymgeek.com/WIDU (optional description here) (as of Feb. 17, 2012, 06:38). |
| AMA | WIDU. Acronym Geek. February 17, 2012, 06:38. Available at: http://www.acronymgeek.com/WIDU. Accessed February 17, 2012, 06:38. |