| APA | OEIH. (2012, February 15). In Acronym Geek. Retrieved 09:28, February 15, 2012, from http://www.acronymgeek.com/OEIH |
| MLA | "OEIH." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OEIH>. |
| MHRA | 'OEIH', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OEIH> [accessed 15 February 2012] |
| Chicago | "OEIH", http://www.acronymgeek.com/OEIH (accessed February 15, 2012). |
| CBE/CSE | OEIH [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OEIH. |
| Bluebook | OEIH, http://www.acronymgeek.com/OEIH (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OEIH, http://www.acronymgeek.com/OEIH (optional description here) (as of Feb. 15, 2012, 09:28). |
| AMA | OEIH. Acronym Geek. February 15, 2012, 09:28. Available at: http://www.acronymgeek.com/OEIH. Accessed February 15, 2012, 09:28. |