| APA | OSPZ. (2012, February 16). In Acronym Geek. Retrieved 22:28, February 16, 2012, from http://www.acronymgeek.com/OSPZ |
| MLA | "OSPZ." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OSPZ>. |
| MHRA | 'OSPZ', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OSPZ> [accessed 16 February 2012] |
| Chicago | "OSPZ", http://www.acronymgeek.com/OSPZ (accessed February 16, 2012). |
| CBE/CSE | OSPZ [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OSPZ. |
| Bluebook | OSPZ, http://www.acronymgeek.com/OSPZ (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OSPZ, http://www.acronymgeek.com/OSPZ (optional description here) (as of Feb. 16, 2012, 22:28). |
| AMA | OSPZ. Acronym Geek. February 16, 2012, 22:28. Available at: http://www.acronymgeek.com/OSPZ. Accessed February 16, 2012, 22:28. |