| APA | Y2K. (2012, February 11). In Acronym Geek. Retrieved 22:25, February 11, 2012, from http://www.acronymgeek.com/Y2K |
| MLA | "Y2K." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/Y2K>. |
| MHRA | 'Y2K', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/Y2K> [accessed 11 February 2012] |
| Chicago | "Y2K", http://www.acronymgeek.com/Y2K (accessed February 11, 2012). |
| CBE/CSE | Y2K [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/Y2K. |
| Bluebook | Y2K, http://www.acronymgeek.com/Y2K (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, Y2K, http://www.acronymgeek.com/Y2K (optional description here) (as of Feb. 11, 2012, 22:25). |
| AMA | Y2K. Acronym Geek. February 11, 2012, 22:25. Available at: http://www.acronymgeek.com/Y2K. Accessed February 11, 2012, 22:25. |