| APA | FHIO. (2012, February 16). In Acronym Geek. Retrieved 11:29, February 16, 2012, from http://www.acronymgeek.com/FHIO |
| MLA | "FHIO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/FHIO>. |
| MHRA | 'FHIO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/FHIO> [accessed 16 February 2012] |
| Chicago | "FHIO", http://www.acronymgeek.com/FHIO (accessed February 16, 2012). |
| CBE/CSE | FHIO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/FHIO. |
| Bluebook | FHIO, http://www.acronymgeek.com/FHIO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, FHIO, http://www.acronymgeek.com/FHIO (optional description here) (as of Feb. 16, 2012, 11:29). |
| AMA | FHIO. Acronym Geek. February 16, 2012, 11:29. Available at: http://www.acronymgeek.com/FHIO. Accessed February 16, 2012, 11:29. |