| APA | OSPN. (2012, February 15). In Acronym Geek. Retrieved 09:27, February 15, 2012, from http://www.acronymgeek.com/OSPN |
| MLA | "OSPN." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OSPN>. |
| MHRA | 'OSPN', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OSPN> [accessed 15 February 2012] |
| Chicago | "OSPN", http://www.acronymgeek.com/OSPN (accessed February 15, 2012). |
| CBE/CSE | OSPN [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OSPN. |
| Bluebook | OSPN, http://www.acronymgeek.com/OSPN (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OSPN, http://www.acronymgeek.com/OSPN (optional description here) (as of Feb. 15, 2012, 09:27). |
| AMA | OSPN. Acronym Geek. February 15, 2012, 09:27. Available at: http://www.acronymgeek.com/OSPN. Accessed February 15, 2012, 09:27. |