| APA | HFDK. (2012, February 16). In Acronym Geek. Retrieved 05:41, February 16, 2012, from http://www.acronymgeek.com/HFDK |
| MLA | "HFDK." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HFDK>. |
| MHRA | 'HFDK', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HFDK> [accessed 16 February 2012] |
| Chicago | "HFDK", http://www.acronymgeek.com/HFDK (accessed February 16, 2012). |
| CBE/CSE | HFDK [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HFDK. |
| Bluebook | HFDK, http://www.acronymgeek.com/HFDK (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HFDK, http://www.acronymgeek.com/HFDK (optional description here) (as of Feb. 16, 2012, 05:41). |
| AMA | HFDK. Acronym Geek. February 16, 2012, 05:41. Available at: http://www.acronymgeek.com/HFDK. Accessed February 16, 2012, 05:41. |