| APA | ERWN. (2012, February 16). In Acronym Geek. Retrieved 00:16, February 16, 2012, from http://www.acronymgeek.com/ERWN |
| MLA | "ERWN." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/ERWN>. |
| MHRA | 'ERWN', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/ERWN> [accessed 16 February 2012] |
| Chicago | "ERWN", http://www.acronymgeek.com/ERWN (accessed February 16, 2012). |
| CBE/CSE | ERWN [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/ERWN. |
| Bluebook | ERWN, http://www.acronymgeek.com/ERWN (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ERWN, http://www.acronymgeek.com/ERWN (optional description here) (as of Feb. 16, 2012, 00:16). |
| AMA | ERWN. Acronym Geek. February 16, 2012, 00:16. Available at: http://www.acronymgeek.com/ERWN. Accessed February 16, 2012, 00:16. |