| APA | UDUM. (2012, February 11). In Acronym Geek. Retrieved 19:55, February 11, 2012, from http://www.acronymgeek.com/UDUM |
| MLA | "UDUM." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/UDUM>. |
| MHRA | 'UDUM', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/UDUM> [accessed 11 February 2012] |
| Chicago | "UDUM", http://www.acronymgeek.com/UDUM (accessed February 11, 2012). |
| CBE/CSE | UDUM [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/UDUM. |
| Bluebook | UDUM, http://www.acronymgeek.com/UDUM (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, UDUM, http://www.acronymgeek.com/UDUM (optional description here) (as of Feb. 11, 2012, 19:55). |
| AMA | UDUM. Acronym Geek. February 11, 2012, 19:55. Available at: http://www.acronymgeek.com/UDUM. Accessed February 11, 2012, 19:55. |