| APA | EHSO. (2012, February 16). In Acronym Geek. Retrieved 21:57, February 16, 2012, from http://www.acronymgeek.com/EHSO |
| MLA | "EHSO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/EHSO>. |
| MHRA | 'EHSO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/EHSO> [accessed 16 February 2012] |
| Chicago | "EHSO", http://www.acronymgeek.com/EHSO (accessed February 16, 2012). |
| CBE/CSE | EHSO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/EHSO. |
| Bluebook | EHSO, http://www.acronymgeek.com/EHSO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EHSO, http://www.acronymgeek.com/EHSO (optional description here) (as of Feb. 16, 2012, 21:57). |
| AMA | EHSO. Acronym Geek. February 16, 2012, 21:57. Available at: http://www.acronymgeek.com/EHSO. Accessed February 16, 2012, 21:57. |