| APA | OSPA. (2012, February 15). In Acronym Geek. Retrieved 13:45, February 15, 2012, from http://www.acronymgeek.com/OSPA |
| MLA | "OSPA." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OSPA>. |
| MHRA | 'OSPA', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OSPA> [accessed 15 February 2012] |
| Chicago | "OSPA", http://www.acronymgeek.com/OSPA (accessed February 15, 2012). |
| CBE/CSE | OSPA [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OSPA. |
| Bluebook | OSPA, http://www.acronymgeek.com/OSPA (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OSPA, http://www.acronymgeek.com/OSPA (optional description here) (as of Feb. 15, 2012, 13:45). |
| AMA | OSPA. Acronym Geek. February 15, 2012, 13:45. Available at: http://www.acronymgeek.com/OSPA. Accessed February 15, 2012, 13:45. |