| APA | NEI. (2012, February 13). In Acronym Geek. Retrieved 21:28, February 13, 2012, from http://www.acronymgeek.com/NEI |
| MLA | "NEI." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/NEI>. |
| MHRA | 'NEI', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/NEI> [accessed 13 February 2012] |
| Chicago | "NEI", http://www.acronymgeek.com/NEI (accessed February 13, 2012). |
| CBE/CSE | NEI [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/NEI. |
| Bluebook | NEI, http://www.acronymgeek.com/NEI (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, NEI, http://www.acronymgeek.com/NEI (optional description here) (as of Feb. 13, 2012, 21:28). |
| AMA | NEI. Acronym Geek. February 13, 2012, 21:28. Available at: http://www.acronymgeek.com/NEI. Accessed February 13, 2012, 21:28. |