| APA | HAYH. (2012, February 15). In Acronym Geek. Retrieved 10:54, February 15, 2012, from http://www.acronymgeek.com/HAYH |
| MLA | "HAYH." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HAYH>. |
| MHRA | 'HAYH', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HAYH> [accessed 15 February 2012] |
| Chicago | "HAYH", http://www.acronymgeek.com/HAYH (accessed February 15, 2012). |
| CBE/CSE | HAYH [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HAYH. |
| Bluebook | HAYH, http://www.acronymgeek.com/HAYH (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HAYH, http://www.acronymgeek.com/HAYH (optional description here) (as of Feb. 15, 2012, 10:54). |
| AMA | HAYH. Acronym Geek. February 15, 2012, 10:54. Available at: http://www.acronymgeek.com/HAYH. Accessed February 15, 2012, 10:54. |