| APA | HHFR. (2012, February 15). In Acronym Geek. Retrieved 04:29, February 15, 2012, from http://www.acronymgeek.com/HHFR |
| MLA | "HHFR." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HHFR>. |
| MHRA | 'HHFR', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HHFR> [accessed 15 February 2012] |
| Chicago | "HHFR", http://www.acronymgeek.com/HHFR (accessed February 15, 2012). |
| CBE/CSE | HHFR [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HHFR. |
| Bluebook | HHFR, http://www.acronymgeek.com/HHFR (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHFR, http://www.acronymgeek.com/HHFR (optional description here) (as of Feb. 15, 2012, 04:29). |
| AMA | HHFR. Acronym Geek. February 15, 2012, 04:29. Available at: http://www.acronymgeek.com/HHFR. Accessed February 15, 2012, 04:29. |