| APA | HRYS. (2012, February 15). In Acronym Geek. Retrieved 10:35, February 15, 2012, from http://www.acronymgeek.com/HRYS |
| MLA | "HRYS." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HRYS>. |
| MHRA | 'HRYS', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HRYS> [accessed 15 February 2012] |
| Chicago | "HRYS", http://www.acronymgeek.com/HRYS (accessed February 15, 2012). |
| CBE/CSE | HRYS [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HRYS. |
| Bluebook | HRYS, http://www.acronymgeek.com/HRYS (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HRYS, http://www.acronymgeek.com/HRYS (optional description here) (as of Feb. 15, 2012, 10:35). |
| AMA | HRYS. Acronym Geek. February 15, 2012, 10:35. Available at: http://www.acronymgeek.com/HRYS. Accessed February 15, 2012, 10:35. |