| APA | NDDF. (2012, February 15). In Acronym Geek. Retrieved 11:09, February 15, 2012, from http://www.acronymgeek.com/NDDF |
| MLA | "NDDF." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/NDDF>. |
| MHRA | 'NDDF', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/NDDF> [accessed 15 February 2012] |
| Chicago | "NDDF", http://www.acronymgeek.com/NDDF (accessed February 15, 2012). |
| CBE/CSE | NDDF [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/NDDF. |
| Bluebook | NDDF, http://www.acronymgeek.com/NDDF (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NDDF, http://www.acronymgeek.com/NDDF (optional description here) (as of Feb. 15, 2012, 11:09). |
| AMA | NDDF. Acronym Geek. February 15, 2012, 11:09. Available at: http://www.acronymgeek.com/NDDF. Accessed February 15, 2012, 11:09. |