| APA | ETVO. (2012, February 16). In Acronym Geek. Retrieved 01:01, February 16, 2012, from http://www.acronymgeek.com/ETVO |
| MLA | "ETVO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/ETVO>. |
| MHRA | 'ETVO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/ETVO> [accessed 16 February 2012] |
| Chicago | "ETVO", http://www.acronymgeek.com/ETVO (accessed February 16, 2012). |
| CBE/CSE | ETVO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/ETVO. |
| Bluebook | ETVO, http://www.acronymgeek.com/ETVO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ETVO, http://www.acronymgeek.com/ETVO (optional description here) (as of Feb. 16, 2012, 01:01). |
| AMA | ETVO. Acronym Geek. February 16, 2012, 01:01. Available at: http://www.acronymgeek.com/ETVO. Accessed February 16, 2012, 01:01. |