| APA | EHYS. (2012, February 16). In Acronym Geek. Retrieved 20:04, February 16, 2012, from http://www.acronymgeek.com/EHYS |
| MLA | "EHYS." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/EHYS>. |
| MHRA | 'EHYS', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/EHYS> [accessed 16 February 2012] |
| Chicago | "EHYS", http://www.acronymgeek.com/EHYS (accessed February 16, 2012). |
| CBE/CSE | EHYS [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/EHYS. |
| Bluebook | EHYS, http://www.acronymgeek.com/EHYS (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EHYS, http://www.acronymgeek.com/EHYS (optional description here) (as of Feb. 16, 2012, 20:04). |
| AMA | EHYS. Acronym Geek. February 16, 2012, 20:04. Available at: http://www.acronymgeek.com/EHYS. Accessed February 16, 2012, 20:04. |