| APA | OSA. (2012, February 13). In Acronym Geek. Retrieved 21:22, February 13, 2012, from http://www.acronymgeek.com/OSA |
| MLA | "OSA." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/OSA>. |
| MHRA | 'OSA', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/OSA> [accessed 13 February 2012] |
| Chicago | "OSA", http://www.acronymgeek.com/OSA (accessed February 13, 2012). |
| CBE/CSE | OSA [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/OSA. |
| Bluebook | OSA, http://www.acronymgeek.com/OSA (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OSA, http://www.acronymgeek.com/OSA (optional description here) (as of Feb. 13, 2012, 21:22). |
| AMA | OSA. Acronym Geek. February 13, 2012, 21:22. Available at: http://www.acronymgeek.com/OSA. Accessed February 13, 2012, 21:22. |