| APA | ZY. (2012, February 11). In Acronym Geek. Retrieved 21:49, February 11, 2012, from http://www.acronymgeek.com/ZY |
| MLA | "ZY." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/ZY>. |
| MHRA | 'ZY', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/ZY> [accessed 11 February 2012] |
| Chicago | "ZY", http://www.acronymgeek.com/ZY (accessed February 11, 2012). |
| CBE/CSE | ZY [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/ZY. |
| Bluebook | ZY, http://www.acronymgeek.com/ZY (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ZY, http://www.acronymgeek.com/ZY (optional description here) (as of Feb. 11, 2012, 21:49). |
| AMA | ZY. Acronym Geek. February 11, 2012, 21:49. Available at: http://www.acronymgeek.com/ZY. Accessed February 11, 2012, 21:49. |