| APA | HDF. (2012, February 10). In Acronym Geek. Retrieved 11:10, February 10, 2012, from http://www.acronymgeek.com/HDF |
| MLA | "HDF." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/HDF>. |
| MHRA | 'HDF', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/HDF> [accessed 10 February 2012] |
| Chicago | "HDF", http://www.acronymgeek.com/HDF (accessed February 10, 2012). |
| CBE/CSE | HDF [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/HDF. |
| Bluebook | HDF, http://www.acronymgeek.com/HDF (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HDF, http://www.acronymgeek.com/HDF (optional description here) (as of Feb. 10, 2012, 11:10). |
| AMA | HDF. Acronym Geek. February 10, 2012, 11:10. Available at: http://www.acronymgeek.com/HDF. Accessed February 10, 2012, 11:10. |