| APA | DIFCI. (2012, February 14). In Acronym Geek. Retrieved 02:57, February 14, 2012, from http://www.acronymgeek.com/DIFCI |
| MLA | "DIFCI." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/DIFCI>. |
| MHRA | 'DIFCI', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/DIFCI> [accessed 14 February 2012] |
| Chicago | "DIFCI", http://www.acronymgeek.com/DIFCI (accessed February 14, 2012). |
| CBE/CSE | DIFCI [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/DIFCI. |
| Bluebook | DIFCI, http://www.acronymgeek.com/DIFCI (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DIFCI, http://www.acronymgeek.com/DIFCI (optional description here) (as of Feb. 14, 2012, 02:57). |
| AMA | DIFCI. Acronym Geek. February 14, 2012, 02:57. Available at: http://www.acronymgeek.com/DIFCI. Accessed February 14, 2012, 02:57. |