| APA | OYEI. (2012, February 15). In Acronym Geek. Retrieved 11:01, February 15, 2012, from http://www.acronymgeek.com/OYEI |
| MLA | "OYEI." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OYEI>. |
| MHRA | 'OYEI', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OYEI> [accessed 15 February 2012] |
| Chicago | "OYEI", http://www.acronymgeek.com/OYEI (accessed February 15, 2012). |
| CBE/CSE | OYEI [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OYEI. |
| Bluebook | OYEI, http://www.acronymgeek.com/OYEI (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OYEI, http://www.acronymgeek.com/OYEI (optional description here) (as of Feb. 15, 2012, 11:01). |
| AMA | OYEI. Acronym Geek. February 15, 2012, 11:01. Available at: http://www.acronymgeek.com/OYEI. Accessed February 15, 2012, 11:01. |