| APA | ENEI. (2012, February 15). In Acronym Geek. Retrieved 18:43, February 15, 2012, from http://www.acronymgeek.com/ENEI |
| MLA | "ENEI." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/ENEI>. |
| MHRA | 'ENEI', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/ENEI> [accessed 15 February 2012] |
| Chicago | "ENEI", http://www.acronymgeek.com/ENEI (accessed February 15, 2012). |
| CBE/CSE | ENEI [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/ENEI. |
| Bluebook | ENEI, http://www.acronymgeek.com/ENEI (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ENEI, http://www.acronymgeek.com/ENEI (optional description here) (as of Feb. 15, 2012, 18:43). |
| AMA | ENEI. Acronym Geek. February 15, 2012, 18:43. Available at: http://www.acronymgeek.com/ENEI. Accessed February 15, 2012, 18:43. |