| APA | REIO. (2012, February 16). In Acronym Geek. Retrieved 20:43, February 16, 2012, from http://www.acronymgeek.com/REIO |
| MLA | "REIO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/REIO>. |
| MHRA | 'REIO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/REIO> [accessed 16 February 2012] |
| Chicago | "REIO", http://www.acronymgeek.com/REIO (accessed February 16, 2012). |
| CBE/CSE | REIO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/REIO. |
| Bluebook | REIO, http://www.acronymgeek.com/REIO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, REIO, http://www.acronymgeek.com/REIO (optional description here) (as of Feb. 16, 2012, 20:43). |
| AMA | REIO. Acronym Geek. February 16, 2012, 20:43. Available at: http://www.acronymgeek.com/REIO. Accessed February 16, 2012, 20:43. |