| APA | DHYS. (2012, February 16). In Acronym Geek. Retrieved 23:40, February 16, 2012, from http://www.acronymgeek.com/DHYS |
| MLA | "DHYS." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/DHYS>. |
| MHRA | 'DHYS', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/DHYS> [accessed 16 February 2012] |
| Chicago | "DHYS", http://www.acronymgeek.com/DHYS (accessed February 16, 2012). |
| CBE/CSE | DHYS [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/DHYS. |
| Bluebook | DHYS, http://www.acronymgeek.com/DHYS (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DHYS, http://www.acronymgeek.com/DHYS (optional description here) (as of Feb. 16, 2012, 23:40). |
| AMA | DHYS. Acronym Geek. February 16, 2012, 23:40. Available at: http://www.acronymgeek.com/DHYS. Accessed February 16, 2012, 23:40. |