| APA | HFDE. (2012, February 15). In Acronym Geek. Retrieved 04:54, February 15, 2012, from http://www.acronymgeek.com/HFDE |
| MLA | "HFDE." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HFDE>. |
| MHRA | 'HFDE', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HFDE> [accessed 15 February 2012] |
| Chicago | "HFDE", http://www.acronymgeek.com/HFDE (accessed February 15, 2012). |
| CBE/CSE | HFDE [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HFDE. |
| Bluebook | HFDE, http://www.acronymgeek.com/HFDE (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HFDE, http://www.acronymgeek.com/HFDE (optional description here) (as of Feb. 15, 2012, 04:54). |
| AMA | HFDE. Acronym Geek. February 15, 2012, 04:54. Available at: http://www.acronymgeek.com/HFDE. Accessed February 15, 2012, 04:54. |