| APA | ERWO. (2012, February 16). In Acronym Geek. Retrieved 19:55, February 16, 2012, from http://www.acronymgeek.com/ERWO |
| MLA | "ERWO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/ERWO>. |
| MHRA | 'ERWO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/ERWO> [accessed 16 February 2012] |
| Chicago | "ERWO", http://www.acronymgeek.com/ERWO (accessed February 16, 2012). |
| CBE/CSE | ERWO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/ERWO. |
| Bluebook | ERWO, http://www.acronymgeek.com/ERWO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ERWO, http://www.acronymgeek.com/ERWO (optional description here) (as of Feb. 16, 2012, 19:55). |
| AMA | ERWO. Acronym Geek. February 16, 2012, 19:55. Available at: http://www.acronymgeek.com/ERWO. Accessed February 16, 2012, 19:55. |