| APA | ZWEI. (2012, February 9). In Acronym Geek. Retrieved 14:28, February 9, 2012, from http://www.acronymgeek.com/ZWEI |
| MLA | "ZWEI." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/ZWEI>. |
| MHRA | 'ZWEI', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/ZWEI> [accessed 9 February 2012] |
| Chicago | "ZWEI", http://www.acronymgeek.com/ZWEI (accessed February 9, 2012). |
| CBE/CSE | ZWEI [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/ZWEI. |
| Bluebook | ZWEI, http://www.acronymgeek.com/ZWEI (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZWEI, http://www.acronymgeek.com/ZWEI (optional description here) (as of Feb. 9, 2012, 14:28). |
| AMA | ZWEI. Acronym Geek. February 9, 2012, 14:28. Available at: http://www.acronymgeek.com/ZWEI. Accessed February 9, 2012, 14:28. |