| APA | HRDK. (2012, February 15). In Acronym Geek. Retrieved 21:44, February 15, 2012, from http://www.acronymgeek.com/HRDK |
| MLA | "HRDK." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HRDK>. |
| MHRA | 'HRDK', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HRDK> [accessed 15 February 2012] |
| Chicago | "HRDK", http://www.acronymgeek.com/HRDK (accessed February 15, 2012). |
| CBE/CSE | HRDK [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HRDK. |
| Bluebook | HRDK, http://www.acronymgeek.com/HRDK (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HRDK, http://www.acronymgeek.com/HRDK (optional description here) (as of Feb. 15, 2012, 21:44). |
| AMA | HRDK. Acronym Geek. February 15, 2012, 21:44. Available at: http://www.acronymgeek.com/HRDK. Accessed February 15, 2012, 21:44. |