| APA | FUDN. (2012, February 15). In Acronym Geek. Retrieved 05:37, February 15, 2012, from http://www.acronymgeek.com/FUDN |
| MLA | "FUDN." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/FUDN>. |
| MHRA | 'FUDN', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/FUDN> [accessed 15 February 2012] |
| Chicago | "FUDN", http://www.acronymgeek.com/FUDN (accessed February 15, 2012). |
| CBE/CSE | FUDN [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/FUDN. |
| Bluebook | FUDN, http://www.acronymgeek.com/FUDN (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, FUDN, http://www.acronymgeek.com/FUDN (optional description here) (as of Feb. 15, 2012, 05:37). |
| AMA | FUDN. Acronym Geek. February 15, 2012, 05:37. Available at: http://www.acronymgeek.com/FUDN. Accessed February 15, 2012, 05:37. |