| APA | ENEP. (2012, February 15). In Acronym Geek. Retrieved 21:01, February 15, 2012, from http://www.acronymgeek.com/ENEP |
| MLA | "ENEP." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/ENEP>. |
| MHRA | 'ENEP', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/ENEP> [accessed 15 February 2012] |
| Chicago | "ENEP", http://www.acronymgeek.com/ENEP (accessed February 15, 2012). |
| CBE/CSE | ENEP [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/ENEP. |
| Bluebook | ENEP, http://www.acronymgeek.com/ENEP (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ENEP, http://www.acronymgeek.com/ENEP (optional description here) (as of Feb. 15, 2012, 21:01). |
| AMA | ENEP. Acronym Geek. February 15, 2012, 21:01. Available at: http://www.acronymgeek.com/ENEP. Accessed February 15, 2012, 21:01. |