| APA | SFN. (2012, February 14). In Acronym Geek. Retrieved 10:03, February 14, 2012, from http://www.acronymgeek.com/SFN |
| MLA | "SFN." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/SFN>. |
| MHRA | 'SFN', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/SFN> [accessed 14 February 2012] |
| Chicago | "SFN", http://www.acronymgeek.com/SFN (accessed February 14, 2012). |
| CBE/CSE | SFN [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/SFN. |
| Bluebook | SFN, http://www.acronymgeek.com/SFN (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SFN, http://www.acronymgeek.com/SFN (optional description here) (as of Feb. 14, 2012, 10:03). |
| AMA | SFN. Acronym Geek. February 14, 2012, 10:03. Available at: http://www.acronymgeek.com/SFN. Accessed February 14, 2012, 10:03. |