| APA | ES<HI. (2012, February 12). In Acronym Geek. Retrieved 13:50, February 12, 2012, from http://www.acronymgeek.com/ES<HI |
| MLA | "ES<HI." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/ES<HI>. |
| MHRA | 'ES<HI', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/ES<HI> [accessed 12 February 2012] |
| Chicago | "ES<HI", http://www.acronymgeek.com/ES<HI (accessed February 12, 2012). |
| CBE/CSE | ES<HI [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/ES<HI. |
| Bluebook | ES<HI, http://www.acronymgeek.com/ES<HI (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ES<HI, http://www.acronymgeek.com/ES<HI (optional description here) (as of Feb. 12, 2012, 13:50). |
| AMA | ES<HI. Acronym Geek. February 12, 2012, 13:50. Available at: http://www.acronymgeek.com/ES<HI. Accessed February 12, 2012, 13:50. |