| APA | DFSO. (2012, February 15). In Acronym Geek. Retrieved 19:39, February 15, 2012, from http://www.acronymgeek.com/DFSO |
| MLA | "DFSO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/DFSO>. |
| MHRA | 'DFSO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/DFSO> [accessed 15 February 2012] |
| Chicago | "DFSO", http://www.acronymgeek.com/DFSO (accessed February 15, 2012). |
| CBE/CSE | DFSO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/DFSO. |
| Bluebook | DFSO, http://www.acronymgeek.com/DFSO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DFSO, http://www.acronymgeek.com/DFSO (optional description here) (as of Feb. 15, 2012, 19:39). |
| AMA | DFSO. Acronym Geek. February 15, 2012, 19:39. Available at: http://www.acronymgeek.com/DFSO. Accessed February 15, 2012, 19:39. |