| APA | ENR. (2012, February 13). In Acronym Geek. Retrieved 20:58, February 13, 2012, from http://www.acronymgeek.com/ENR |
| MLA | "ENR." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/ENR>. |
| MHRA | 'ENR', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/ENR> [accessed 13 February 2012] |
| Chicago | "ENR", http://www.acronymgeek.com/ENR (accessed February 13, 2012). |
| CBE/CSE | ENR [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/ENR. |
| Bluebook | ENR, http://www.acronymgeek.com/ENR (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ENR, http://www.acronymgeek.com/ENR (optional description here) (as of Feb. 13, 2012, 20:58). |
| AMA | ENR. Acronym Geek. February 13, 2012, 20:58. Available at: http://www.acronymgeek.com/ENR. Accessed February 13, 2012, 20:58. |