| APA | OYS. (2012, February 13). In Acronym Geek. Retrieved 21:29, February 13, 2012, from http://www.acronymgeek.com/OYS |
| MLA | "OYS." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/OYS>. |
| MHRA | 'OYS', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/OYS> [accessed 13 February 2012] |
| Chicago | "OYS", http://www.acronymgeek.com/OYS (accessed February 13, 2012). |
| CBE/CSE | OYS [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/OYS. |
| Bluebook | OYS, http://www.acronymgeek.com/OYS (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OYS, http://www.acronymgeek.com/OYS (optional description here) (as of Feb. 13, 2012, 21:29). |
| AMA | OYS. Acronym Geek. February 13, 2012, 21:29. Available at: http://www.acronymgeek.com/OYS. Accessed February 13, 2012, 21:29. |