| APA | ENEN. (2012, February 16). In Acronym Geek. Retrieved 07:39, February 16, 2012, from http://www.acronymgeek.com/ENEN |
| MLA | "ENEN." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/ENEN>. |
| MHRA | 'ENEN', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/ENEN> [accessed 16 February 2012] |
| Chicago | "ENEN", http://www.acronymgeek.com/ENEN (accessed February 16, 2012). |
| CBE/CSE | ENEN [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/ENEN. |
| Bluebook | ENEN, http://www.acronymgeek.com/ENEN (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ENEN, http://www.acronymgeek.com/ENEN (optional description here) (as of Feb. 16, 2012, 07:39). |
| AMA | ENEN. Acronym Geek. February 16, 2012, 07:39. Available at: http://www.acronymgeek.com/ENEN. Accessed February 16, 2012, 07:39. |