| APA | DFO. (2012, February 14). In Acronym Geek. Retrieved 04:06, February 14, 2012, from http://www.acronymgeek.com/DFO |
| MLA | "DFO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/DFO>. |
| MHRA | 'DFO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/DFO> [accessed 14 February 2012] |
| Chicago | "DFO", http://www.acronymgeek.com/DFO (accessed February 14, 2012). |
| CBE/CSE | DFO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/DFO. |
| Bluebook | DFO, http://www.acronymgeek.com/DFO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DFO, http://www.acronymgeek.com/DFO (optional description here) (as of Feb. 14, 2012, 04:06). |
| AMA | DFO. Acronym Geek. February 14, 2012, 04:06. Available at: http://www.acronymgeek.com/DFO. Accessed February 14, 2012, 04:06. |