| APA | NTD. (2012, February 14). In Acronym Geek. Retrieved 04:37, February 14, 2012, from http://www.acronymgeek.com/NTD |
| MLA | "NTD." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/NTD>. |
| MHRA | 'NTD', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/NTD> [accessed 14 February 2012] |
| Chicago | "NTD", http://www.acronymgeek.com/NTD (accessed February 14, 2012). |
| CBE/CSE | NTD [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/NTD. |
| Bluebook | NTD, http://www.acronymgeek.com/NTD (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NTD, http://www.acronymgeek.com/NTD (optional description here) (as of Feb. 14, 2012, 04:37). |
| AMA | NTD. Acronym Geek. February 14, 2012, 04:37. Available at: http://www.acronymgeek.com/NTD. Accessed February 14, 2012, 04:37. |