| APA | HIOV. (2012, February 15). In Acronym Geek. Retrieved 11:22, February 15, 2012, from http://www.acronymgeek.com/HIOV |
| MLA | "HIOV." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HIOV>. |
| MHRA | 'HIOV', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HIOV> [accessed 15 February 2012] |
| Chicago | "HIOV", http://www.acronymgeek.com/HIOV (accessed February 15, 2012). |
| CBE/CSE | HIOV [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HIOV. |
| Bluebook | HIOV, http://www.acronymgeek.com/HIOV (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HIOV, http://www.acronymgeek.com/HIOV (optional description here) (as of Feb. 15, 2012, 11:22). |
| AMA | HIOV. Acronym Geek. February 15, 2012, 11:22. Available at: http://www.acronymgeek.com/HIOV. Accessed February 15, 2012, 11:22. |