| APA | OSRO. (2012, February 17). In Acronym Geek. Retrieved 03:40, February 17, 2012, from http://www.acronymgeek.com/OSRO |
| MLA | "OSRO." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/OSRO>. |
| MHRA | 'OSRO', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/OSRO> [accessed 17 February 2012] |
| Chicago | "OSRO", http://www.acronymgeek.com/OSRO (accessed February 17, 2012). |
| CBE/CSE | OSRO [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/OSRO. |
| Bluebook | OSRO, http://www.acronymgeek.com/OSRO (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OSRO, http://www.acronymgeek.com/OSRO (optional description here) (as of Feb. 17, 2012, 03:40). |
| AMA | OSRO. Acronym Geek. February 17, 2012, 03:40. Available at: http://www.acronymgeek.com/OSRO. Accessed February 17, 2012, 03:40. |