| APA | OHI. (2012, February 10). In Acronym Geek. Retrieved 11:04, February 10, 2012, from http://www.acronymgeek.com/OHI |
| MLA | "OHI." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/OHI>. |
| MHRA | 'OHI', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/OHI> [accessed 10 February 2012] |
| Chicago | "OHI", http://www.acronymgeek.com/OHI (accessed February 10, 2012). |
| CBE/CSE | OHI [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/OHI. |
| Bluebook | OHI, http://www.acronymgeek.com/OHI (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OHI, http://www.acronymgeek.com/OHI (optional description here) (as of Feb. 10, 2012, 11:04). |
| AMA | OHI. Acronym Geek. February 10, 2012, 11:04. Available at: http://www.acronymgeek.com/OHI. Accessed February 10, 2012, 11:04. |