| APA | HIOR. (2012, February 16). In Acronym Geek. Retrieved 07:03, February 16, 2012, from http://www.acronymgeek.com/HIOR |
| MLA | "HIOR." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HIOR>. |
| MHRA | 'HIOR', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HIOR> [accessed 16 February 2012] |
| Chicago | "HIOR", http://www.acronymgeek.com/HIOR (accessed February 16, 2012). |
| CBE/CSE | HIOR [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HIOR. |
| Bluebook | HIOR, http://www.acronymgeek.com/HIOR (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HIOR, http://www.acronymgeek.com/HIOR (optional description here) (as of Feb. 16, 2012, 07:03). |
| AMA | HIOR. Acronym Geek. February 16, 2012, 07:03. Available at: http://www.acronymgeek.com/HIOR. Accessed February 16, 2012, 07:03. |