| APA | NGC. (2012, February 10). In Acronym Geek. Retrieved 07:26, February 10, 2012, from http://www.acronymgeek.com/NGC |
| MLA | "NGC." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/NGC>. |
| MHRA | 'NGC', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/NGC> [accessed 10 February 2012] |
| Chicago | "NGC", http://www.acronymgeek.com/NGC (accessed February 10, 2012). |
| CBE/CSE | NGC [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/NGC. |
| Bluebook | NGC, http://www.acronymgeek.com/NGC (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NGC, http://www.acronymgeek.com/NGC (optional description here) (as of Feb. 10, 2012, 07:26). |
| AMA | NGC. Acronym Geek. February 10, 2012, 07:26. Available at: http://www.acronymgeek.com/NGC. Accessed February 10, 2012, 07:26. |