| APA | OTOS. (2012, February 16). In Acronym Geek. Retrieved 04:26, February 16, 2012, from http://www.acronymgeek.com/OTOS |
| MLA | "OTOS." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OTOS>. |
| MHRA | 'OTOS', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OTOS> [accessed 16 February 2012] |
| Chicago | "OTOS", http://www.acronymgeek.com/OTOS (accessed February 16, 2012). |
| CBE/CSE | OTOS [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OTOS. |
| Bluebook | OTOS, http://www.acronymgeek.com/OTOS (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OTOS, http://www.acronymgeek.com/OTOS (optional description here) (as of Feb. 16, 2012, 04:26). |
| AMA | OTOS. Acronym Geek. February 16, 2012, 04:26. Available at: http://www.acronymgeek.com/OTOS. Accessed February 16, 2012, 04:26. |