| APA | HIEA. (2012, February 17). In Acronym Geek. Retrieved 07:16, February 17, 2012, from http://www.acronymgeek.com/HIEA |
| MLA | "HIEA." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HIEA>. |
| MHRA | 'HIEA', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HIEA> [accessed 17 February 2012] |
| Chicago | "HIEA", http://www.acronymgeek.com/HIEA (accessed February 17, 2012). |
| CBE/CSE | HIEA [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HIEA. |
| Bluebook | HIEA, http://www.acronymgeek.com/HIEA (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HIEA, http://www.acronymgeek.com/HIEA (optional description here) (as of Feb. 17, 2012, 07:16). |
| AMA | HIEA. Acronym Geek. February 17, 2012, 07:16. Available at: http://www.acronymgeek.com/HIEA. Accessed February 17, 2012, 07:16. |