| APA | HREL. (2012, February 15). In Acronym Geek. Retrieved 11:26, February 15, 2012, from http://www.acronymgeek.com/HREL |
| MLA | "HREL." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HREL>. |
| MHRA | 'HREL', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HREL> [accessed 15 February 2012] |
| Chicago | "HREL", http://www.acronymgeek.com/HREL (accessed February 15, 2012). |
| CBE/CSE | HREL [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HREL. |
| Bluebook | HREL, http://www.acronymgeek.com/HREL (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HREL, http://www.acronymgeek.com/HREL (optional description here) (as of Feb. 15, 2012, 11:26). |
| AMA | HREL. Acronym Geek. February 15, 2012, 11:26. Available at: http://www.acronymgeek.com/HREL. Accessed February 15, 2012, 11:26. |