| APA | FOPS. (2012, February 15). In Acronym Geek. Retrieved 11:34, February 15, 2012, from http://www.acronymgeek.com/FOPS |
| MLA | "FOPS." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/FOPS>. |
| MHRA | 'FOPS', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/FOPS> [accessed 15 February 2012] |
| Chicago | "FOPS", http://www.acronymgeek.com/FOPS (accessed February 15, 2012). |
| CBE/CSE | FOPS [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/FOPS. |
| Bluebook | FOPS, http://www.acronymgeek.com/FOPS (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, FOPS, http://www.acronymgeek.com/FOPS (optional description here) (as of Feb. 15, 2012, 11:34). |
| AMA | FOPS. Acronym Geek. February 15, 2012, 11:34. Available at: http://www.acronymgeek.com/FOPS. Accessed February 15, 2012, 11:34. |