| APA | EFI. (2012, February 8). In Acronym Geek. Retrieved 11:27, February 8, 2012, from http://www.acronymgeek.com/EFI |
| MLA | "EFI." Acronym Geek. (2012). Acronym Geek. 8 Feb 2012 <http://www.acronymgeek.com/EFI>. |
| MHRA | 'EFI', Acronym Geek, 8 February 2012, <http://www.acronymgeek.com/EFI> [accessed 8 February 2012] |
| Chicago | "EFI", http://www.acronymgeek.com/EFI (accessed February 8, 2012). |
| CBE/CSE | EFI [Internet]. Acronym Geek; 2012 Feb 8 [cited 2012 Feb 8]. Available from: http://www.acronymgeek.com/EFI. |
| Bluebook | EFI, http://www.acronymgeek.com/EFI (last visited February 8, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EFI, http://www.acronymgeek.com/EFI (optional description here) (as of Feb. 8, 2012, 11:27). |
| AMA | EFI. Acronym Geek. February 8, 2012, 11:27. Available at: http://www.acronymgeek.com/EFI. Accessed February 8, 2012, 11:27. |