| APA | ISF. (2012, February 14). In Acronym Geek. Retrieved 07:53, February 14, 2012, from http://www.acronymgeek.com/ISF |
| MLA | "ISF." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ISF>. |
| MHRA | 'ISF', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ISF> [accessed 14 February 2012] |
| Chicago | "ISF", http://www.acronymgeek.com/ISF (accessed February 14, 2012). |
| CBE/CSE | ISF [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ISF. |
| Bluebook | ISF, http://www.acronymgeek.com/ISF (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ISF, http://www.acronymgeek.com/ISF (optional description here) (as of Feb. 14, 2012, 07:53). |
| AMA | ISF. Acronym Geek. February 14, 2012, 07:53. Available at: http://www.acronymgeek.com/ISF. Accessed February 14, 2012, 07:53. |