| APA | D.F.. (2012, February 14). In Acronym Geek. Retrieved 21:25, February 14, 2012, from http://www.acronymgeek.com/D.F. |
| MLA | "D.F.." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/D.F.>. |
| MHRA | 'D.F.', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/D.F.> [accessed 14 February 2012] |
| Chicago | "D.F.", http://www.acronymgeek.com/D.F. (accessed February 14, 2012). |
| CBE/CSE | D.F. [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/D.F.. |
| Bluebook | D.F., http://www.acronymgeek.com/D.F. (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, D.F., http://www.acronymgeek.com/D.F. (optional description here) (as of Feb. 14, 2012, 21:25). |
| AMA | D.F.. Acronym Geek. February 14, 2012, 21:25. Available at: http://www.acronymgeek.com/D.F.. Accessed February 14, 2012, 21:25. |