| APA | HEIS. (2012, February 17). In Acronym Geek. Retrieved 04:11, February 17, 2012, from http://www.acronymgeek.com/HEIS |
| MLA | "HEIS." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HEIS>. |
| MHRA | 'HEIS', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HEIS> [accessed 17 February 2012] |
| Chicago | "HEIS", http://www.acronymgeek.com/HEIS (accessed February 17, 2012). |
| CBE/CSE | HEIS [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HEIS. |
| Bluebook | HEIS, http://www.acronymgeek.com/HEIS (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HEIS, http://www.acronymgeek.com/HEIS (optional description here) (as of Feb. 17, 2012, 04:11). |
| AMA | HEIS. Acronym Geek. February 17, 2012, 04:11. Available at: http://www.acronymgeek.com/HEIS. Accessed February 17, 2012, 04:11. |