| APA | XDN. (2012, February 14). In Acronym Geek. Retrieved 06:28, February 14, 2012, from http://www.acronymgeek.com/XDN |
| MLA | "XDN." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/XDN>. |
| MHRA | 'XDN', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/XDN> [accessed 14 February 2012] |
| Chicago | "XDN", http://www.acronymgeek.com/XDN (accessed February 14, 2012). |
| CBE/CSE | XDN [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/XDN. |
| Bluebook | XDN, http://www.acronymgeek.com/XDN (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, XDN, http://www.acronymgeek.com/XDN (optional description here) (as of Feb. 14, 2012, 06:28). |
| AMA | XDN. Acronym Geek. February 14, 2012, 06:28. Available at: http://www.acronymgeek.com/XDN. Accessed February 14, 2012, 06:28. |