| APA | ETZN. (2012, February 16). In Acronym Geek. Retrieved 07:40, February 16, 2012, from http://www.acronymgeek.com/ETZN |
| MLA | "ETZN." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/ETZN>. |
| MHRA | 'ETZN', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/ETZN> [accessed 16 February 2012] |
| Chicago | "ETZN", http://www.acronymgeek.com/ETZN (accessed February 16, 2012). |
| CBE/CSE | ETZN [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/ETZN. |
| Bluebook | ETZN, http://www.acronymgeek.com/ETZN (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ETZN, http://www.acronymgeek.com/ETZN (optional description here) (as of Feb. 16, 2012, 07:40). |
| AMA | ETZN. Acronym Geek. February 16, 2012, 07:40. Available at: http://www.acronymgeek.com/ETZN. Accessed February 16, 2012, 07:40. |