| APA | NDUF. (2012, February 16). In Acronym Geek. Retrieved 01:57, February 16, 2012, from http://www.acronymgeek.com/NDUF |
| MLA | "NDUF." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/NDUF>. |
| MHRA | 'NDUF', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/NDUF> [accessed 16 February 2012] |
| Chicago | "NDUF", http://www.acronymgeek.com/NDUF (accessed February 16, 2012). |
| CBE/CSE | NDUF [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/NDUF. |
| Bluebook | NDUF, http://www.acronymgeek.com/NDUF (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NDUF, http://www.acronymgeek.com/NDUF (optional description here) (as of Feb. 16, 2012, 01:57). |
| AMA | NDUF. Acronym Geek. February 16, 2012, 01:57. Available at: http://www.acronymgeek.com/NDUF. Accessed February 16, 2012, 01:57. |