| APA | DEO. (2012, February 14). In Acronym Geek. Retrieved 19:16, February 14, 2012, from http://www.acronymgeek.com/DEO |
| MLA | "DEO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/DEO>. |
| MHRA | 'DEO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/DEO> [accessed 14 February 2012] |
| Chicago | "DEO", http://www.acronymgeek.com/DEO (accessed February 14, 2012). |
| CBE/CSE | DEO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/DEO. |
| Bluebook | DEO, http://www.acronymgeek.com/DEO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DEO, http://www.acronymgeek.com/DEO (optional description here) (as of Feb. 14, 2012, 19:16). |
| AMA | DEO. Acronym Geek. February 14, 2012, 19:16. Available at: http://www.acronymgeek.com/DEO. Accessed February 14, 2012, 19:16. |