| APA | HRDD. (2012, February 14). In Acronym Geek. Retrieved 23:56, February 14, 2012, from http://www.acronymgeek.com/HRDD |
| MLA | "HRDD." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/HRDD>. |
| MHRA | 'HRDD', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/HRDD> [accessed 14 February 2012] |
| Chicago | "HRDD", http://www.acronymgeek.com/HRDD (accessed February 14, 2012). |
| CBE/CSE | HRDD [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/HRDD. |
| Bluebook | HRDD, http://www.acronymgeek.com/HRDD (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HRDD, http://www.acronymgeek.com/HRDD (optional description here) (as of Feb. 14, 2012, 23:56). |
| AMA | HRDD. Acronym Geek. February 14, 2012, 23:56. Available at: http://www.acronymgeek.com/HRDD. Accessed February 14, 2012, 23:56. |