| APA | HREH. (2012, February 15). In Acronym Geek. Retrieved 23:40, February 15, 2012, from http://www.acronymgeek.com/HREH |
| MLA | "HREH." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HREH>. |
| MHRA | 'HREH', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HREH> [accessed 15 February 2012] |
| Chicago | "HREH", http://www.acronymgeek.com/HREH (accessed February 15, 2012). |
| CBE/CSE | HREH [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HREH. |
| Bluebook | HREH, http://www.acronymgeek.com/HREH (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HREH, http://www.acronymgeek.com/HREH (optional description here) (as of Feb. 15, 2012, 23:40). |
| AMA | HREH. Acronym Geek. February 15, 2012, 23:40. Available at: http://www.acronymgeek.com/HREH. Accessed February 15, 2012, 23:40. |