| APA | HREA. (2012, February 16). In Acronym Geek. Retrieved 19:37, February 16, 2012, from http://www.acronymgeek.com/HREA |
| MLA | "HREA." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HREA>. |
| MHRA | 'HREA', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HREA> [accessed 16 February 2012] |
| Chicago | "HREA", http://www.acronymgeek.com/HREA (accessed February 16, 2012). |
| CBE/CSE | HREA [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HREA. |
| Bluebook | HREA, http://www.acronymgeek.com/HREA (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HREA, http://www.acronymgeek.com/HREA (optional description here) (as of Feb. 16, 2012, 19:37). |
| AMA | HREA. Acronym Geek. February 16, 2012, 19:37. Available at: http://www.acronymgeek.com/HREA. Accessed February 16, 2012, 19:37. |