| APA | HEAI. (2012, February 16). In Acronym Geek. Retrieved 10:49, February 16, 2012, from http://www.acronymgeek.com/HEAI |
| MLA | "HEAI." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HEAI>. |
| MHRA | 'HEAI', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HEAI> [accessed 16 February 2012] |
| Chicago | "HEAI", http://www.acronymgeek.com/HEAI (accessed February 16, 2012). |
| CBE/CSE | HEAI [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HEAI. |
| Bluebook | HEAI, http://www.acronymgeek.com/HEAI (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HEAI, http://www.acronymgeek.com/HEAI (optional description here) (as of Feb. 16, 2012, 10:49). |
| AMA | HEAI. Acronym Geek. February 16, 2012, 10:49. Available at: http://www.acronymgeek.com/HEAI. Accessed February 16, 2012, 10:49. |