| APA | D-O. (2012, February 14). In Acronym Geek. Retrieved 10:06, February 14, 2012, from http://www.acronymgeek.com/D-O |
| MLA | "D-O." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/D-O>. |
| MHRA | 'D-O', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/D-O> [accessed 14 February 2012] |
| Chicago | "D-O", http://www.acronymgeek.com/D-O (accessed February 14, 2012). |
| CBE/CSE | D-O [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/D-O. |
| Bluebook | D-O, http://www.acronymgeek.com/D-O (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, D-O, http://www.acronymgeek.com/D-O (optional description here) (as of Feb. 14, 2012, 10:06). |
| AMA | D-O. Acronym Geek. February 14, 2012, 10:06. Available at: http://www.acronymgeek.com/D-O. Accessed February 14, 2012, 10:06. |