| APA | OIHG. (2012, February 14). In Acronym Geek. Retrieved 15:49, February 14, 2012, from http://www.acronymgeek.com/OIHG |
| MLA | "OIHG." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/OIHG>. |
| MHRA | 'OIHG', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/OIHG> [accessed 14 February 2012] |
| Chicago | "OIHG", http://www.acronymgeek.com/OIHG (accessed February 14, 2012). |
| CBE/CSE | OIHG [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/OIHG. |
| Bluebook | OIHG, http://www.acronymgeek.com/OIHG (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OIHG, http://www.acronymgeek.com/OIHG (optional description here) (as of Feb. 14, 2012, 15:49). |
| AMA | OIHG. Acronym Geek. February 14, 2012, 15:49. Available at: http://www.acronymgeek.com/OIHG. Accessed February 14, 2012, 15:49. |