| APA | NIG. (2012, February 13). In Acronym Geek. Retrieved 20:51, February 13, 2012, from http://www.acronymgeek.com/NIG |
| MLA | "NIG." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/NIG>. |
| MHRA | 'NIG', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/NIG> [accessed 13 February 2012] |
| Chicago | "NIG", http://www.acronymgeek.com/NIG (accessed February 13, 2012). |
| CBE/CSE | NIG [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/NIG. |
| Bluebook | NIG, http://www.acronymgeek.com/NIG (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NIG, http://www.acronymgeek.com/NIG (optional description here) (as of Feb. 13, 2012, 20:51). |
| AMA | NIG. Acronym Geek. February 13, 2012, 20:51. Available at: http://www.acronymgeek.com/NIG. Accessed February 13, 2012, 20:51. |