| APA | ESFI. (2012, February 16). In Acronym Geek. Retrieved 21:59, February 16, 2012, from http://www.acronymgeek.com/ESFI |
| MLA | "ESFI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/ESFI>. |
| MHRA | 'ESFI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/ESFI> [accessed 16 February 2012] |
| Chicago | "ESFI", http://www.acronymgeek.com/ESFI (accessed February 16, 2012). |
| CBE/CSE | ESFI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/ESFI. |
| Bluebook | ESFI, http://www.acronymgeek.com/ESFI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ESFI, http://www.acronymgeek.com/ESFI (optional description here) (as of Feb. 16, 2012, 21:59). |
| AMA | ESFI. Acronym Geek. February 16, 2012, 21:59. Available at: http://www.acronymgeek.com/ESFI. Accessed February 16, 2012, 21:59. |