| APA | RO. (2012, February 14). In Acronym Geek. Retrieved 06:49, February 14, 2012, from http://www.acronymgeek.com/RO |
| MLA | "RO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/RO>. |
| MHRA | 'RO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/RO> [accessed 14 February 2012] |
| Chicago | "RO", http://www.acronymgeek.com/RO (accessed February 14, 2012). |
| CBE/CSE | RO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/RO. |
| Bluebook | RO, http://www.acronymgeek.com/RO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, RO, http://www.acronymgeek.com/RO (optional description here) (as of Feb. 14, 2012, 06:49). |
| AMA | RO. Acronym Geek. February 14, 2012, 06:49. Available at: http://www.acronymgeek.com/RO. Accessed February 14, 2012, 06:49. |