| APA | ENAO. (2012, February 16). In Acronym Geek. Retrieved 22:24, February 16, 2012, from http://www.acronymgeek.com/ENAO |
| MLA | "ENAO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/ENAO>. |
| MHRA | 'ENAO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/ENAO> [accessed 16 February 2012] |
| Chicago | "ENAO", http://www.acronymgeek.com/ENAO (accessed February 16, 2012). |
| CBE/CSE | ENAO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/ENAO. |
| Bluebook | ENAO, http://www.acronymgeek.com/ENAO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ENAO, http://www.acronymgeek.com/ENAO (optional description here) (as of Feb. 16, 2012, 22:24). |
| AMA | ENAO. Acronym Geek. February 16, 2012, 22:24. Available at: http://www.acronymgeek.com/ENAO. Accessed February 16, 2012, 22:24. |