| APA | OTIS. (2012, February 14). In Acronym Geek. Retrieved 00:05, February 14, 2012, from http://www.acronymgeek.com/OTIS |
| MLA | "OTIS." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/OTIS>. |
| MHRA | 'OTIS', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/OTIS> [accessed 14 February 2012] |
| Chicago | "OTIS", http://www.acronymgeek.com/OTIS (accessed February 14, 2012). |
| CBE/CSE | OTIS [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/OTIS. |
| Bluebook | OTIS, http://www.acronymgeek.com/OTIS (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OTIS, http://www.acronymgeek.com/OTIS (optional description here) (as of Feb. 14, 2012, 00:05). |
| AMA | OTIS. Acronym Geek. February 14, 2012, 00:05. Available at: http://www.acronymgeek.com/OTIS. Accessed February 14, 2012, 00:05. |