| APA | CDU. (2012, February 13). In Acronym Geek. Retrieved 21:34, February 13, 2012, from http://www.acronymgeek.com/CDU |
| MLA | "CDU." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/CDU>. |
| MHRA | 'CDU', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/CDU> [accessed 13 February 2012] |
| Chicago | "CDU", http://www.acronymgeek.com/CDU (accessed February 13, 2012). |
| CBE/CSE | CDU [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/CDU. |
| Bluebook | CDU, http://www.acronymgeek.com/CDU (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, CDU, http://www.acronymgeek.com/CDU (optional description here) (as of Feb. 13, 2012, 21:34). |
| AMA | CDU. Acronym Geek. February 13, 2012, 21:34. Available at: http://www.acronymgeek.com/CDU. Accessed February 13, 2012, 21:34. |