| APA | ETWS. (2012, February 14). In Acronym Geek. Retrieved 13:45, February 14, 2012, from http://www.acronymgeek.com/ETWS |
| MLA | "ETWS." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ETWS>. |
| MHRA | 'ETWS', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ETWS> [accessed 14 February 2012] |
| Chicago | "ETWS", http://www.acronymgeek.com/ETWS (accessed February 14, 2012). |
| CBE/CSE | ETWS [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ETWS. |
| Bluebook | ETWS, http://www.acronymgeek.com/ETWS (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ETWS, http://www.acronymgeek.com/ETWS (optional description here) (as of Feb. 14, 2012, 13:45). |
| AMA | ETWS. Acronym Geek. February 14, 2012, 13:45. Available at: http://www.acronymgeek.com/ETWS. Accessed February 14, 2012, 13:45. |