| APA | HRDN. (2012, February 17). In Acronym Geek. Retrieved 07:37, February 17, 2012, from http://www.acronymgeek.com/HRDN |
| MLA | "HRDN." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HRDN>. |
| MHRA | 'HRDN', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HRDN> [accessed 17 February 2012] |
| Chicago | "HRDN", http://www.acronymgeek.com/HRDN (accessed February 17, 2012). |
| CBE/CSE | HRDN [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HRDN. |
| Bluebook | HRDN, http://www.acronymgeek.com/HRDN (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HRDN, http://www.acronymgeek.com/HRDN (optional description here) (as of Feb. 17, 2012, 07:37). |
| AMA | HRDN. Acronym Geek. February 17, 2012, 07:37. Available at: http://www.acronymgeek.com/HRDN. Accessed February 17, 2012, 07:37. |