| APA | ZEEI. (2012, February 14). In Acronym Geek. Retrieved 18:56, February 14, 2012, from http://www.acronymgeek.com/ZEEI |
| MLA | "ZEEI." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ZEEI>. |
| MHRA | 'ZEEI', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ZEEI> [accessed 14 February 2012] |
| Chicago | "ZEEI", http://www.acronymgeek.com/ZEEI (accessed February 14, 2012). |
| CBE/CSE | ZEEI [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ZEEI. |
| Bluebook | ZEEI, http://www.acronymgeek.com/ZEEI (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZEEI, http://www.acronymgeek.com/ZEEI (optional description here) (as of Feb. 14, 2012, 18:56). |
| AMA | ZEEI. Acronym Geek. February 14, 2012, 18:56. Available at: http://www.acronymgeek.com/ZEEI. Accessed February 14, 2012, 18:56. |