| APA | IFEI. (2012, February 14). In Acronym Geek. Retrieved 08:42, February 14, 2012, from http://www.acronymgeek.com/IFEI |
| MLA | "IFEI." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/IFEI>. |
| MHRA | 'IFEI', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/IFEI> [accessed 14 February 2012] |
| Chicago | "IFEI", http://www.acronymgeek.com/IFEI (accessed February 14, 2012). |
| CBE/CSE | IFEI [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/IFEI. |
| Bluebook | IFEI, http://www.acronymgeek.com/IFEI (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, IFEI, http://www.acronymgeek.com/IFEI (optional description here) (as of Feb. 14, 2012, 08:42). |
| AMA | IFEI. Acronym Geek. February 14, 2012, 08:42. Available at: http://www.acronymgeek.com/IFEI. Accessed February 14, 2012, 08:42. |