| APA | HHFI. (2012, February 17). In Acronym Geek. Retrieved 01:34, February 17, 2012, from http://www.acronymgeek.com/HHFI |
| MLA | "HHFI." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HHFI>. |
| MHRA | 'HHFI', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HHFI> [accessed 17 February 2012] |
| Chicago | "HHFI", http://www.acronymgeek.com/HHFI (accessed February 17, 2012). |
| CBE/CSE | HHFI [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HHFI. |
| Bluebook | HHFI, http://www.acronymgeek.com/HHFI (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHFI, http://www.acronymgeek.com/HHFI (optional description here) (as of Feb. 17, 2012, 01:34). |
| AMA | HHFI. Acronym Geek. February 17, 2012, 01:34. Available at: http://www.acronymgeek.com/HHFI. Accessed February 17, 2012, 01:34. |