| APA | SFOP. (2012, February 12). In Acronym Geek. Retrieved 10:31, February 12, 2012, from http://www.acronymgeek.com/SFOP |
| MLA | "SFOP." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/SFOP>. |
| MHRA | 'SFOP', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/SFOP> [accessed 12 February 2012] |
| Chicago | "SFOP", http://www.acronymgeek.com/SFOP (accessed February 12, 2012). |
| CBE/CSE | SFOP [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/SFOP. |
| Bluebook | SFOP, http://www.acronymgeek.com/SFOP (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, SFOP, http://www.acronymgeek.com/SFOP (optional description here) (as of Feb. 12, 2012, 10:31). |
| AMA | SFOP. Acronym Geek. February 12, 2012, 10:31. Available at: http://www.acronymgeek.com/SFOP. Accessed February 12, 2012, 10:31. |