| APA | ZUPO. (2012, February 14). In Acronym Geek. Retrieved 08:46, February 14, 2012, from http://www.acronymgeek.com/ZUPO |
| MLA | "ZUPO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ZUPO>. |
| MHRA | 'ZUPO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ZUPO> [accessed 14 February 2012] |
| Chicago | "ZUPO", http://www.acronymgeek.com/ZUPO (accessed February 14, 2012). |
| CBE/CSE | ZUPO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ZUPO. |
| Bluebook | ZUPO, http://www.acronymgeek.com/ZUPO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZUPO, http://www.acronymgeek.com/ZUPO (optional description here) (as of Feb. 14, 2012, 08:46). |
| AMA | ZUPO. Acronym Geek. February 14, 2012, 08:46. Available at: http://www.acronymgeek.com/ZUPO. Accessed February 14, 2012, 08:46. |