| APA | HREU. (2012, February 15). In Acronym Geek. Retrieved 19:14, February 15, 2012, from http://www.acronymgeek.com/HREU |
| MLA | "HREU." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HREU>. |
| MHRA | 'HREU', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HREU> [accessed 15 February 2012] |
| Chicago | "HREU", http://www.acronymgeek.com/HREU (accessed February 15, 2012). |
| CBE/CSE | HREU [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HREU. |
| Bluebook | HREU, http://www.acronymgeek.com/HREU (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HREU, http://www.acronymgeek.com/HREU (optional description here) (as of Feb. 15, 2012, 19:14). |
| AMA | HREU. Acronym Geek. February 15, 2012, 19:14. Available at: http://www.acronymgeek.com/HREU. Accessed February 15, 2012, 19:14. |