| APA | H.F.. (2012, February 15). In Acronym Geek. Retrieved 22:40, February 15, 2012, from http://www.acronymgeek.com/H.F. |
| MLA | "H.F.." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/H.F.>. |
| MHRA | 'H.F.', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/H.F.> [accessed 15 February 2012] |
| Chicago | "H.F.", http://www.acronymgeek.com/H.F. (accessed February 15, 2012). |
| CBE/CSE | H.F. [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/H.F.. |
| Bluebook | H.F., http://www.acronymgeek.com/H.F. (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, H.F., http://www.acronymgeek.com/H.F. (optional description here) (as of Feb. 15, 2012, 22:40). |
| AMA | H.F.. Acronym Geek. February 15, 2012, 22:40. Available at: http://www.acronymgeek.com/H.F.. Accessed February 15, 2012, 22:40. |