| APA | ETWU. (2012, February 14). In Acronym Geek. Retrieved 08:17, February 14, 2012, from http://www.acronymgeek.com/ETWU |
| MLA | "ETWU." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ETWU>. |
| MHRA | 'ETWU', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ETWU> [accessed 14 February 2012] |
| Chicago | "ETWU", http://www.acronymgeek.com/ETWU (accessed February 14, 2012). |
| CBE/CSE | ETWU [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ETWU. |
| Bluebook | ETWU, http://www.acronymgeek.com/ETWU (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ETWU, http://www.acronymgeek.com/ETWU (optional description here) (as of Feb. 14, 2012, 08:17). |
| AMA | ETWU. Acronym Geek. February 14, 2012, 08:17. Available at: http://www.acronymgeek.com/ETWU. Accessed February 14, 2012, 08:17. |