| APA | OTO. (2012, February 13). In Acronym Geek. Retrieved 21:33, February 13, 2012, from http://www.acronymgeek.com/OTO |
| MLA | "OTO." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/OTO>. |
| MHRA | 'OTO', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/OTO> [accessed 13 February 2012] |
| Chicago | "OTO", http://www.acronymgeek.com/OTO (accessed February 13, 2012). |
| CBE/CSE | OTO [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/OTO. |
| Bluebook | OTO, http://www.acronymgeek.com/OTO (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OTO, http://www.acronymgeek.com/OTO (optional description here) (as of Feb. 13, 2012, 21:33). |
| AMA | OTO. Acronym Geek. February 13, 2012, 21:33. Available at: http://www.acronymgeek.com/OTO. Accessed February 13, 2012, 21:33. |