| APA | HDRE. (2012, February 16). In Acronym Geek. Retrieved 03:27, February 16, 2012, from http://www.acronymgeek.com/HDRE |
| MLA | "HDRE." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HDRE>. |
| MHRA | 'HDRE', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HDRE> [accessed 16 February 2012] |
| Chicago | "HDRE", http://www.acronymgeek.com/HDRE (accessed February 16, 2012). |
| CBE/CSE | HDRE [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HDRE. |
| Bluebook | HDRE, http://www.acronymgeek.com/HDRE (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HDRE, http://www.acronymgeek.com/HDRE (optional description here) (as of Feb. 16, 2012, 03:27). |
| AMA | HDRE. Acronym Geek. February 16, 2012, 03:27. Available at: http://www.acronymgeek.com/HDRE. Accessed February 16, 2012, 03:27. |