| APA | DFDU. (2012, February 15). In Acronym Geek. Retrieved 11:22, February 15, 2012, from http://www.acronymgeek.com/DFDU |
| MLA | "DFDU." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/DFDU>. |
| MHRA | 'DFDU', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/DFDU> [accessed 15 February 2012] |
| Chicago | "DFDU", http://www.acronymgeek.com/DFDU (accessed February 15, 2012). |
| CBE/CSE | DFDU [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/DFDU. |
| Bluebook | DFDU, http://www.acronymgeek.com/DFDU (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DFDU, http://www.acronymgeek.com/DFDU (optional description here) (as of Feb. 15, 2012, 11:22). |
| AMA | DFDU. Acronym Geek. February 15, 2012, 11:22. Available at: http://www.acronymgeek.com/DFDU. Accessed February 15, 2012, 11:22. |