| APA | HAYS. (2012, February 16). In Acronym Geek. Retrieved 00:02, February 16, 2012, from http://www.acronymgeek.com/HAYS |
| MLA | "HAYS." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HAYS>. |
| MHRA | 'HAYS', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HAYS> [accessed 16 February 2012] |
| Chicago | "HAYS", http://www.acronymgeek.com/HAYS (accessed February 16, 2012). |
| CBE/CSE | HAYS [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HAYS. |
| Bluebook | HAYS, http://www.acronymgeek.com/HAYS (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HAYS, http://www.acronymgeek.com/HAYS (optional description here) (as of Feb. 16, 2012, 00:02). |
| AMA | HAYS. Acronym Geek. February 16, 2012, 00:02. Available at: http://www.acronymgeek.com/HAYS. Accessed February 16, 2012, 00:02. |