| APA | OIER. (2012, February 15). In Acronym Geek. Retrieved 05:34, February 15, 2012, from http://www.acronymgeek.com/OIER |
| MLA | "OIER." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OIER>. |
| MHRA | 'OIER', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OIER> [accessed 15 February 2012] |
| Chicago | "OIER", http://www.acronymgeek.com/OIER (accessed February 15, 2012). |
| CBE/CSE | OIER [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OIER. |
| Bluebook | OIER, http://www.acronymgeek.com/OIER (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OIER, http://www.acronymgeek.com/OIER (optional description here) (as of Feb. 15, 2012, 05:34). |
| AMA | OIER. Acronym Geek. February 15, 2012, 05:34. Available at: http://www.acronymgeek.com/OIER. Accessed February 15, 2012, 05:34. |