| APA | ZCE. (2012, February 11). In Acronym Geek. Retrieved 21:59, February 11, 2012, from http://www.acronymgeek.com/ZCE |
| MLA | "ZCE." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/ZCE>. |
| MHRA | 'ZCE', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/ZCE> [accessed 11 February 2012] |
| Chicago | "ZCE", http://www.acronymgeek.com/ZCE (accessed February 11, 2012). |
| CBE/CSE | ZCE [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/ZCE. |
| Bluebook | ZCE, http://www.acronymgeek.com/ZCE (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZCE, http://www.acronymgeek.com/ZCE (optional description here) (as of Feb. 11, 2012, 21:59). |
| AMA | ZCE. Acronym Geek. February 11, 2012, 21:59. Available at: http://www.acronymgeek.com/ZCE. Accessed February 11, 2012, 21:59. |