| APA | IFDU. (2012, February 14). In Acronym Geek. Retrieved 13:58, February 14, 2012, from http://www.acronymgeek.com/IFDU |
| MLA | "IFDU." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/IFDU>. |
| MHRA | 'IFDU', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/IFDU> [accessed 14 February 2012] |
| Chicago | "IFDU", http://www.acronymgeek.com/IFDU (accessed February 14, 2012). |
| CBE/CSE | IFDU [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/IFDU. |
| Bluebook | IFDU, http://www.acronymgeek.com/IFDU (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, IFDU, http://www.acronymgeek.com/IFDU (optional description here) (as of Feb. 14, 2012, 13:58). |
| AMA | IFDU. Acronym Geek. February 14, 2012, 13:58. Available at: http://www.acronymgeek.com/IFDU. Accessed February 14, 2012, 13:58. |