| APA | FCOS. (2012, February 16). In Acronym Geek. Retrieved 04:49, February 16, 2012, from http://www.acronymgeek.com/FCOS |
| MLA | "FCOS." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/FCOS>. |
| MHRA | 'FCOS', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/FCOS> [accessed 16 February 2012] |
| Chicago | "FCOS", http://www.acronymgeek.com/FCOS (accessed February 16, 2012). |
| CBE/CSE | FCOS [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/FCOS. |
| Bluebook | FCOS, http://www.acronymgeek.com/FCOS (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, FCOS, http://www.acronymgeek.com/FCOS (optional description here) (as of Feb. 16, 2012, 04:49). |
| AMA | FCOS. Acronym Geek. February 16, 2012, 04:49. Available at: http://www.acronymgeek.com/FCOS. Accessed February 16, 2012, 04:49. |