| APA | ZIOP. (2012, February 16). In Acronym Geek. Retrieved 17:24, February 16, 2012, from http://www.acronymgeek.com/ZIOP |
| MLA | "ZIOP." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/ZIOP>. |
| MHRA | 'ZIOP', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/ZIOP> [accessed 16 February 2012] |
| Chicago | "ZIOP", http://www.acronymgeek.com/ZIOP (accessed February 16, 2012). |
| CBE/CSE | ZIOP [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/ZIOP. |
| Bluebook | ZIOP, http://www.acronymgeek.com/ZIOP (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZIOP, http://www.acronymgeek.com/ZIOP (optional description here) (as of Feb. 16, 2012, 17:24). |
| AMA | ZIOP. Acronym Geek. February 16, 2012, 17:24. Available at: http://www.acronymgeek.com/ZIOP. Accessed February 16, 2012, 17:24. |