| APA | ETDO. (2012, February 15). In Acronym Geek. Retrieved 23:16, February 15, 2012, from http://www.acronymgeek.com/ETDO |
| MLA | "ETDO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/ETDO>. |
| MHRA | 'ETDO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/ETDO> [accessed 15 February 2012] |
| Chicago | "ETDO", http://www.acronymgeek.com/ETDO (accessed February 15, 2012). |
| CBE/CSE | ETDO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/ETDO. |
| Bluebook | ETDO, http://www.acronymgeek.com/ETDO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ETDO, http://www.acronymgeek.com/ETDO (optional description here) (as of Feb. 15, 2012, 23:16). |
| AMA | ETDO. Acronym Geek. February 15, 2012, 23:16. Available at: http://www.acronymgeek.com/ETDO. Accessed February 15, 2012, 23:16. |