| APA | HFEF. (2012, February 16). In Acronym Geek. Retrieved 22:50, February 16, 2012, from http://www.acronymgeek.com/HFEF |
| MLA | "HFEF." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HFEF>. |
| MHRA | 'HFEF', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HFEF> [accessed 16 February 2012] |
| Chicago | "HFEF", http://www.acronymgeek.com/HFEF (accessed February 16, 2012). |
| CBE/CSE | HFEF [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HFEF. |
| Bluebook | HFEF, http://www.acronymgeek.com/HFEF (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HFEF, http://www.acronymgeek.com/HFEF (optional description here) (as of Feb. 16, 2012, 22:50). |
| AMA | HFEF. Acronym Geek. February 16, 2012, 22:50. Available at: http://www.acronymgeek.com/HFEF. Accessed February 16, 2012, 22:50. |