| APA | OSI. (2012, February 9). In Acronym Geek. Retrieved 21:12, February 9, 2012, from http://www.acronymgeek.com/OSI |
| MLA | "OSI." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/OSI>. |
| MHRA | 'OSI', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/OSI> [accessed 9 February 2012] |
| Chicago | "OSI", http://www.acronymgeek.com/OSI (accessed February 9, 2012). |
| CBE/CSE | OSI [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/OSI. |
| Bluebook | OSI, http://www.acronymgeek.com/OSI (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OSI, http://www.acronymgeek.com/OSI (optional description here) (as of Feb. 9, 2012, 21:12). |
| AMA | OSI. Acronym Geek. February 9, 2012, 21:12. Available at: http://www.acronymgeek.com/OSI. Accessed February 9, 2012, 21:12. |