| APA | UNDI. (2012, February 16). In Acronym Geek. Retrieved 02:03, February 16, 2012, from http://www.acronymgeek.com/UNDI |
| MLA | "UNDI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/UNDI>. |
| MHRA | 'UNDI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/UNDI> [accessed 16 February 2012] |
| Chicago | "UNDI", http://www.acronymgeek.com/UNDI (accessed February 16, 2012). |
| CBE/CSE | UNDI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/UNDI. |
| Bluebook | UNDI, http://www.acronymgeek.com/UNDI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, UNDI, http://www.acronymgeek.com/UNDI (optional description here) (as of Feb. 16, 2012, 02:03). |
| AMA | UNDI. Acronym Geek. February 16, 2012, 02:03. Available at: http://www.acronymgeek.com/UNDI. Accessed February 16, 2012, 02:03. |