| APA | MDO. (2012, February 14). In Acronym Geek. Retrieved 11:26, February 14, 2012, from http://www.acronymgeek.com/MDO |
| MLA | "MDO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/MDO>. |
| MHRA | 'MDO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/MDO> [accessed 14 February 2012] |
| Chicago | "MDO", http://www.acronymgeek.com/MDO (accessed February 14, 2012). |
| CBE/CSE | MDO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/MDO. |
| Bluebook | MDO, http://www.acronymgeek.com/MDO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, MDO, http://www.acronymgeek.com/MDO (optional description here) (as of Feb. 14, 2012, 11:26). |
| AMA | MDO. Acronym Geek. February 14, 2012, 11:26. Available at: http://www.acronymgeek.com/MDO. Accessed February 14, 2012, 11:26. |