| APA | HFDD. (2012, February 15). In Acronym Geek. Retrieved 12:44, February 15, 2012, from http://www.acronymgeek.com/HFDD |
| MLA | "HFDD." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HFDD>. |
| MHRA | 'HFDD', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HFDD> [accessed 15 February 2012] |
| Chicago | "HFDD", http://www.acronymgeek.com/HFDD (accessed February 15, 2012). |
| CBE/CSE | HFDD [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HFDD. |
| Bluebook | HFDD, http://www.acronymgeek.com/HFDD (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HFDD, http://www.acronymgeek.com/HFDD (optional description here) (as of Feb. 15, 2012, 12:44). |
| AMA | HFDD. Acronym Geek. February 15, 2012, 12:44. Available at: http://www.acronymgeek.com/HFDD. Accessed February 15, 2012, 12:44. |