| APA | HHF. (2012, February 10). In Acronym Geek. Retrieved 10:46, February 10, 2012, from http://www.acronymgeek.com/HHF |
| MLA | "HHF." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/HHF>. |
| MHRA | 'HHF', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/HHF> [accessed 10 February 2012] |
| Chicago | "HHF", http://www.acronymgeek.com/HHF (accessed February 10, 2012). |
| CBE/CSE | HHF [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/HHF. |
| Bluebook | HHF, http://www.acronymgeek.com/HHF (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHF, http://www.acronymgeek.com/HHF (optional description here) (as of Feb. 10, 2012, 10:46). |
| AMA | HHF. Acronym Geek. February 10, 2012, 10:46. Available at: http://www.acronymgeek.com/HHF. Accessed February 10, 2012, 10:46. |