| APA | IFSY. (2012, February 15). In Acronym Geek. Retrieved 17:18, February 15, 2012, from http://www.acronymgeek.com/IFSY |
| MLA | "IFSY." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/IFSY>. |
| MHRA | 'IFSY', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/IFSY> [accessed 15 February 2012] |
| Chicago | "IFSY", http://www.acronymgeek.com/IFSY (accessed February 15, 2012). |
| CBE/CSE | IFSY [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/IFSY. |
| Bluebook | IFSY, http://www.acronymgeek.com/IFSY (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, IFSY, http://www.acronymgeek.com/IFSY (optional description here) (as of Feb. 15, 2012, 17:18). |
| AMA | IFSY. Acronym Geek. February 15, 2012, 17:18. Available at: http://www.acronymgeek.com/IFSY. Accessed February 15, 2012, 17:18. |