| APA | OTRN. (2012, February 16). In Acronym Geek. Retrieved 06:08, February 16, 2012, from http://www.acronymgeek.com/OTRN |
| MLA | "OTRN." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OTRN>. |
| MHRA | 'OTRN', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OTRN> [accessed 16 February 2012] |
| Chicago | "OTRN", http://www.acronymgeek.com/OTRN (accessed February 16, 2012). |
| CBE/CSE | OTRN [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OTRN. |
| Bluebook | OTRN, http://www.acronymgeek.com/OTRN (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OTRN, http://www.acronymgeek.com/OTRN (optional description here) (as of Feb. 16, 2012, 06:08). |
| AMA | OTRN. Acronym Geek. February 16, 2012, 06:08. Available at: http://www.acronymgeek.com/OTRN. Accessed February 16, 2012, 06:08. |