| APA | HRA. (2012, February 14). In Acronym Geek. Retrieved 06:48, February 14, 2012, from http://www.acronymgeek.com/HRA |
| MLA | "HRA." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/HRA>. |
| MHRA | 'HRA', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/HRA> [accessed 14 February 2012] |
| Chicago | "HRA", http://www.acronymgeek.com/HRA (accessed February 14, 2012). |
| CBE/CSE | HRA [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/HRA. |
| Bluebook | HRA, http://www.acronymgeek.com/HRA (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HRA, http://www.acronymgeek.com/HRA (optional description here) (as of Feb. 14, 2012, 06:48). |
| AMA | HRA. Acronym Geek. February 14, 2012, 06:48. Available at: http://www.acronymgeek.com/HRA. Accessed February 14, 2012, 06:48. |