| APA | H4Y. (2012, February 13). In Acronym Geek. Retrieved 21:26, February 13, 2012, from http://www.acronymgeek.com/H4Y |
| MLA | "H4Y." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/H4Y>. |
| MHRA | 'H4Y', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/H4Y> [accessed 13 February 2012] |
| Chicago | "H4Y", http://www.acronymgeek.com/H4Y (accessed February 13, 2012). |
| CBE/CSE | H4Y [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/H4Y. |
| Bluebook | H4Y, http://www.acronymgeek.com/H4Y (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, H4Y, http://www.acronymgeek.com/H4Y (optional description here) (as of Feb. 13, 2012, 21:26). |
| AMA | H4Y. Acronym Geek. February 13, 2012, 21:26. Available at: http://www.acronymgeek.com/H4Y. Accessed February 13, 2012, 21:26. |