| APA | OSPE. (2012, February 16). In Acronym Geek. Retrieved 20:57, February 16, 2012, from http://www.acronymgeek.com/OSPE |
| MLA | "OSPE." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OSPE>. |
| MHRA | 'OSPE', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OSPE> [accessed 16 February 2012] |
| Chicago | "OSPE", http://www.acronymgeek.com/OSPE (accessed February 16, 2012). |
| CBE/CSE | OSPE [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OSPE. |
| Bluebook | OSPE, http://www.acronymgeek.com/OSPE (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OSPE, http://www.acronymgeek.com/OSPE (optional description here) (as of Feb. 16, 2012, 20:57). |
| AMA | OSPE. Acronym Geek. February 16, 2012, 20:57. Available at: http://www.acronymgeek.com/OSPE. Accessed February 16, 2012, 20:57. |