| APA | HYHF. (2012, February 17). In Acronym Geek. Retrieved 00:29, February 17, 2012, from http://www.acronymgeek.com/HYHF |
| MLA | "HYHF." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HYHF>. |
| MHRA | 'HYHF', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HYHF> [accessed 17 February 2012] |
| Chicago | "HYHF", http://www.acronymgeek.com/HYHF (accessed February 17, 2012). |
| CBE/CSE | HYHF [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HYHF. |
| Bluebook | HYHF, http://www.acronymgeek.com/HYHF (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HYHF, http://www.acronymgeek.com/HYHF (optional description here) (as of Feb. 17, 2012, 00:29). |
| AMA | HYHF. Acronym Geek. February 17, 2012, 00:29. Available at: http://www.acronymgeek.com/HYHF. Accessed February 17, 2012, 00:29. |