| APA | FDO. (2012, February 14). In Acronym Geek. Retrieved 07:11, February 14, 2012, from http://www.acronymgeek.com/FDO |
| MLA | "FDO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/FDO>. |
| MHRA | 'FDO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/FDO> [accessed 14 February 2012] |
| Chicago | "FDO", http://www.acronymgeek.com/FDO (accessed February 14, 2012). |
| CBE/CSE | FDO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/FDO. |
| Bluebook | FDO, http://www.acronymgeek.com/FDO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, FDO, http://www.acronymgeek.com/FDO (optional description here) (as of Feb. 14, 2012, 07:11). |
| AMA | FDO. Acronym Geek. February 14, 2012, 07:11. Available at: http://www.acronymgeek.com/FDO. Accessed February 14, 2012, 07:11. |