| APA | HHFD. (2012, February 11). In Acronym Geek. Retrieved 20:28, February 11, 2012, from http://www.acronymgeek.com/HHFD |
| MLA | "HHFD." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/HHFD>. |
| MHRA | 'HHFD', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/HHFD> [accessed 11 February 2012] |
| Chicago | "HHFD", http://www.acronymgeek.com/HHFD (accessed February 11, 2012). |
| CBE/CSE | HHFD [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/HHFD. |
| Bluebook | HHFD, http://www.acronymgeek.com/HHFD (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHFD, http://www.acronymgeek.com/HHFD (optional description here) (as of Feb. 11, 2012, 20:28). |
| AMA | HHFD. Acronym Geek. February 11, 2012, 20:28. Available at: http://www.acronymgeek.com/HHFD. Accessed February 11, 2012, 20:28. |