| APA | SF-20. (2012, February 10). In Acronym Geek. Retrieved 09:20, February 10, 2012, from http://www.acronymgeek.com/SF-20 |
| MLA | "SF-20." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/SF-20>. |
| MHRA | 'SF-20', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/SF-20> [accessed 10 February 2012] |
| Chicago | "SF-20", http://www.acronymgeek.com/SF-20 (accessed February 10, 2012). |
| CBE/CSE | SF-20 [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/SF-20. |
| Bluebook | SF-20, http://www.acronymgeek.com/SF-20 (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SF-20, http://www.acronymgeek.com/SF-20 (optional description here) (as of Feb. 10, 2012, 09:20). |
| AMA | SF-20. Acronym Geek. February 10, 2012, 09:20. Available at: http://www.acronymgeek.com/SF-20. Accessed February 10, 2012, 09:20. |