| APA | REO. (2012, February 14). In Acronym Geek. Retrieved 07:08, February 14, 2012, from http://www.acronymgeek.com/REO |
| MLA | "REO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/REO>. |
| MHRA | 'REO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/REO> [accessed 14 February 2012] |
| Chicago | "REO", http://www.acronymgeek.com/REO (accessed February 14, 2012). |
| CBE/CSE | REO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/REO. |
| Bluebook | REO, http://www.acronymgeek.com/REO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, REO, http://www.acronymgeek.com/REO (optional description here) (as of Feb. 14, 2012, 07:08). |
| AMA | REO. Acronym Geek. February 14, 2012, 07:08. Available at: http://www.acronymgeek.com/REO. Accessed February 14, 2012, 07:08. |