| APA | REOS. (2012, February 14). In Acronym Geek. Retrieved 18:01, February 14, 2012, from http://www.acronymgeek.com/REOS |
| MLA | "REOS." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/REOS>. |
| MHRA | 'REOS', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/REOS> [accessed 14 February 2012] |
| Chicago | "REOS", http://www.acronymgeek.com/REOS (accessed February 14, 2012). |
| CBE/CSE | REOS [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/REOS. |
| Bluebook | REOS, http://www.acronymgeek.com/REOS (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, REOS, http://www.acronymgeek.com/REOS (optional description here) (as of Feb. 14, 2012, 18:01). |
| AMA | REOS. Acronym Geek. February 14, 2012, 18:01. Available at: http://www.acronymgeek.com/REOS. Accessed February 14, 2012, 18:01. |