| APA | DPYS. (2012, February 17). In Acronym Geek. Retrieved 05:54, February 17, 2012, from http://www.acronymgeek.com/DPYS |
| MLA | "DPYS." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/DPYS>. |
| MHRA | 'DPYS', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/DPYS> [accessed 17 February 2012] |
| Chicago | "DPYS", http://www.acronymgeek.com/DPYS (accessed February 17, 2012). |
| CBE/CSE | DPYS [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/DPYS. |
| Bluebook | DPYS, http://www.acronymgeek.com/DPYS (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DPYS, http://www.acronymgeek.com/DPYS (optional description here) (as of Feb. 17, 2012, 05:54). |
| AMA | DPYS. Acronym Geek. February 17, 2012, 05:54. Available at: http://www.acronymgeek.com/DPYS. Accessed February 17, 2012, 05:54. |