| APA | YPK. (2012, February 11). In Acronym Geek. Retrieved 22:28, February 11, 2012, from http://www.acronymgeek.com/YPK |
| MLA | "YPK." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/YPK>. |
| MHRA | 'YPK', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/YPK> [accessed 11 February 2012] |
| Chicago | "YPK", http://www.acronymgeek.com/YPK (accessed February 11, 2012). |
| CBE/CSE | YPK [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/YPK. |
| Bluebook | YPK, http://www.acronymgeek.com/YPK (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, YPK, http://www.acronymgeek.com/YPK (optional description here) (as of Feb. 11, 2012, 22:28). |
| AMA | YPK. Acronym Geek. February 11, 2012, 22:28. Available at: http://www.acronymgeek.com/YPK. Accessed February 11, 2012, 22:28. |