| APA | LUD. (2012, February 14). In Acronym Geek. Retrieved 07:00, February 14, 2012, from http://www.acronymgeek.com/LUD |
| MLA | "LUD." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/LUD>. |
| MHRA | 'LUD', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/LUD> [accessed 14 February 2012] |
| Chicago | "LUD", http://www.acronymgeek.com/LUD (accessed February 14, 2012). |
| CBE/CSE | LUD [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/LUD. |
| Bluebook | LUD, http://www.acronymgeek.com/LUD (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, LUD, http://www.acronymgeek.com/LUD (optional description here) (as of Feb. 14, 2012, 07:00). |
| AMA | LUD. Acronym Geek. February 14, 2012, 07:00. Available at: http://www.acronymgeek.com/LUD. Accessed February 14, 2012, 07:00. |