| APA | DE&OS. (2012, February 11). In Acronym Geek. Retrieved 17:49, February 11, 2012, from http://www.acronymgeek.com/DE&OS |
| MLA | "DE&OS." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/DE&OS>. |
| MHRA | 'DE&OS', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/DE&OS> [accessed 11 February 2012] |
| Chicago | "DE&OS", http://www.acronymgeek.com/DE&OS (accessed February 11, 2012). |
| CBE/CSE | DE&OS [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/DE&OS. |
| Bluebook | DE&OS, http://www.acronymgeek.com/DE&OS (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DE&OS, http://www.acronymgeek.com/DE&OS (optional description here) (as of Feb. 11, 2012, 17:49). |
| AMA | DE&OS. Acronym Geek. February 11, 2012, 17:49. Available at: http://www.acronymgeek.com/DE&OS. Accessed February 11, 2012, 17:49. |