| APA | SFIO. (2012, February 17). In Acronym Geek. Retrieved 06:00, February 17, 2012, from http://www.acronymgeek.com/SFIO |
| MLA | "SFIO." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/SFIO>. |
| MHRA | 'SFIO', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/SFIO> [accessed 17 February 2012] |
| Chicago | "SFIO", http://www.acronymgeek.com/SFIO (accessed February 17, 2012). |
| CBE/CSE | SFIO [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/SFIO. |
| Bluebook | SFIO, http://www.acronymgeek.com/SFIO (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SFIO, http://www.acronymgeek.com/SFIO (optional description here) (as of Feb. 17, 2012, 06:00). |
| AMA | SFIO. Acronym Geek. February 17, 2012, 06:00. Available at: http://www.acronymgeek.com/SFIO. Accessed February 17, 2012, 06:00. |