| APA | NGDC. (2012, February 10). In Acronym Geek. Retrieved 13:06, February 10, 2012, from http://www.acronymgeek.com/NGDC |
| MLA | "NGDC." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/NGDC>. |
| MHRA | 'NGDC', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/NGDC> [accessed 10 February 2012] |
| Chicago | "NGDC", http://www.acronymgeek.com/NGDC (accessed February 10, 2012). |
| CBE/CSE | NGDC [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/NGDC. |
| Bluebook | NGDC, http://www.acronymgeek.com/NGDC (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NGDC, http://www.acronymgeek.com/NGDC (optional description here) (as of Feb. 10, 2012, 13:06). |
| AMA | NGDC. Acronym Geek. February 10, 2012, 13:06. Available at: http://www.acronymgeek.com/NGDC. Accessed February 10, 2012, 13:06. |