| APA | REOI. (2012, February 16). In Acronym Geek. Retrieved 11:38, February 16, 2012, from http://www.acronymgeek.com/REOI |
| MLA | "REOI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/REOI>. |
| MHRA | 'REOI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/REOI> [accessed 16 February 2012] |
| Chicago | "REOI", http://www.acronymgeek.com/REOI (accessed February 16, 2012). |
| CBE/CSE | REOI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/REOI. |
| Bluebook | REOI, http://www.acronymgeek.com/REOI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, REOI, http://www.acronymgeek.com/REOI (optional description here) (as of Feb. 16, 2012, 11:38). |
| AMA | REOI. Acronym Geek. February 16, 2012, 11:38. Available at: http://www.acronymgeek.com/REOI. Accessed February 16, 2012, 11:38. |