| APA | OTRE. (2012, February 17). In Acronym Geek. Retrieved 01:49, February 17, 2012, from http://www.acronymgeek.com/OTRE |
| MLA | "OTRE." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/OTRE>. |
| MHRA | 'OTRE', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/OTRE> [accessed 17 February 2012] |
| Chicago | "OTRE", http://www.acronymgeek.com/OTRE (accessed February 17, 2012). |
| CBE/CSE | OTRE [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/OTRE. |
| Bluebook | OTRE, http://www.acronymgeek.com/OTRE (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OTRE, http://www.acronymgeek.com/OTRE (optional description here) (as of Feb. 17, 2012, 01:49). |
| AMA | OTRE. Acronym Geek. February 17, 2012, 01:49. Available at: http://www.acronymgeek.com/OTRE. Accessed February 17, 2012, 01:49. |