| APA | OEHO. (2012, February 15). In Acronym Geek. Retrieved 20:32, February 15, 2012, from http://www.acronymgeek.com/OEHO |
| MLA | "OEHO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OEHO>. |
| MHRA | 'OEHO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OEHO> [accessed 15 February 2012] |
| Chicago | "OEHO", http://www.acronymgeek.com/OEHO (accessed February 15, 2012). |
| CBE/CSE | OEHO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OEHO. |
| Bluebook | OEHO, http://www.acronymgeek.com/OEHO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OEHO, http://www.acronymgeek.com/OEHO (optional description here) (as of Feb. 15, 2012, 20:32). |
| AMA | OEHO. Acronym Geek. February 15, 2012, 20:32. Available at: http://www.acronymgeek.com/OEHO. Accessed February 15, 2012, 20:32. |