| APA | HSYF. (2012, February 16). In Acronym Geek. Retrieved 07:26, February 16, 2012, from http://www.acronymgeek.com/HSYF |
| MLA | "HSYF." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HSYF>. |
| MHRA | 'HSYF', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HSYF> [accessed 16 February 2012] |
| Chicago | "HSYF", http://www.acronymgeek.com/HSYF (accessed February 16, 2012). |
| CBE/CSE | HSYF [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HSYF. |
| Bluebook | HSYF, http://www.acronymgeek.com/HSYF (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HSYF, http://www.acronymgeek.com/HSYF (optional description here) (as of Feb. 16, 2012, 07:26). |
| AMA | HSYF. Acronym Geek. February 16, 2012, 07:26. Available at: http://www.acronymgeek.com/HSYF. Accessed February 16, 2012, 07:26. |