| APA | HENG. (2012, February 15). In Acronym Geek. Retrieved 10:44, February 15, 2012, from http://www.acronymgeek.com/HENG |
| MLA | "HENG." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HENG>. |
| MHRA | 'HENG', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HENG> [accessed 15 February 2012] |
| Chicago | "HENG", http://www.acronymgeek.com/HENG (accessed February 15, 2012). |
| CBE/CSE | HENG [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HENG. |
| Bluebook | HENG, http://www.acronymgeek.com/HENG (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HENG, http://www.acronymgeek.com/HENG (optional description here) (as of Feb. 15, 2012, 10:44). |
| AMA | HENG. Acronym Geek. February 15, 2012, 10:44. Available at: http://www.acronymgeek.com/HENG. Accessed February 15, 2012, 10:44. |