| APA | YDK. (2012, February 14). In Acronym Geek. Retrieved 10:02, February 14, 2012, from http://www.acronymgeek.com/YDK |
| MLA | "YDK." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/YDK>. |
| MHRA | 'YDK', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/YDK> [accessed 14 February 2012] |
| Chicago | "YDK", http://www.acronymgeek.com/YDK (accessed February 14, 2012). |
| CBE/CSE | YDK [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/YDK. |
| Bluebook | YDK, http://www.acronymgeek.com/YDK (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, YDK, http://www.acronymgeek.com/YDK (optional description here) (as of Feb. 14, 2012, 10:02). |
| AMA | YDK. Acronym Geek. February 14, 2012, 10:02. Available at: http://www.acronymgeek.com/YDK. Accessed February 14, 2012, 10:02. |