| APA | OTRH. (2012, February 14). In Acronym Geek. Retrieved 20:21, February 14, 2012, from http://www.acronymgeek.com/OTRH |
| MLA | "OTRH." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/OTRH>. |
| MHRA | 'OTRH', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/OTRH> [accessed 14 February 2012] |
| Chicago | "OTRH", http://www.acronymgeek.com/OTRH (accessed February 14, 2012). |
| CBE/CSE | OTRH [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/OTRH. |
| Bluebook | OTRH, http://www.acronymgeek.com/OTRH (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OTRH, http://www.acronymgeek.com/OTRH (optional description here) (as of Feb. 14, 2012, 20:21). |
| AMA | OTRH. Acronym Geek. February 14, 2012, 20:21. Available at: http://www.acronymgeek.com/OTRH. Accessed February 14, 2012, 20:21. |