| APA | OTU. (2012, February 14). In Acronym Geek. Retrieved 07:41, February 14, 2012, from http://www.acronymgeek.com/OTU |
| MLA | "OTU." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/OTU>. |
| MHRA | 'OTU', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/OTU> [accessed 14 February 2012] |
| Chicago | "OTU", http://www.acronymgeek.com/OTU (accessed February 14, 2012). |
| CBE/CSE | OTU [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/OTU. |
| Bluebook | OTU, http://www.acronymgeek.com/OTU (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OTU, http://www.acronymgeek.com/OTU (optional description here) (as of Feb. 14, 2012, 07:41). |
| AMA | OTU. Acronym Geek. February 14, 2012, 07:41. Available at: http://www.acronymgeek.com/OTU. Accessed February 14, 2012, 07:41. |