| APA | OREH. (2012, February 17). In Acronym Geek. Retrieved 02:43, February 17, 2012, from http://www.acronymgeek.com/OREH |
| MLA | "OREH." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/OREH>. |
| MHRA | 'OREH', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/OREH> [accessed 17 February 2012] |
| Chicago | "OREH", http://www.acronymgeek.com/OREH (accessed February 17, 2012). |
| CBE/CSE | OREH [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/OREH. |
| Bluebook | OREH, http://www.acronymgeek.com/OREH (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OREH, http://www.acronymgeek.com/OREH (optional description here) (as of Feb. 17, 2012, 02:43). |
| AMA | OREH. Acronym Geek. February 17, 2012, 02:43. Available at: http://www.acronymgeek.com/OREH. Accessed February 17, 2012, 02:43. |