| APA | SF. (2012, February 11). In Acronym Geek. Retrieved 06:55, February 11, 2012, from http://www.acronymgeek.com/SF |
| MLA | "SF." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/SF>. |
| MHRA | 'SF', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/SF> [accessed 11 February 2012] |
| Chicago | "SF", http://www.acronymgeek.com/SF (accessed February 11, 2012). |
| CBE/CSE | SF [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/SF. |
| Bluebook | SF, http://www.acronymgeek.com/SF (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SF, http://www.acronymgeek.com/SF (optional description here) (as of Feb. 11, 2012, 06:55). |
| AMA | SF. Acronym Geek. February 11, 2012, 06:55. Available at: http://www.acronymgeek.com/SF. Accessed February 11, 2012, 06:55. |