| APA | EHWO. (2012, February 11). In Acronym Geek. Retrieved 14:24, February 11, 2012, from http://www.acronymgeek.com/EHWO |
| MLA | "EHWO." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/EHWO>. |
| MHRA | 'EHWO', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/EHWO> [accessed 11 February 2012] |
| Chicago | "EHWO", http://www.acronymgeek.com/EHWO (accessed February 11, 2012). |
| CBE/CSE | EHWO [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/EHWO. |
| Bluebook | EHWO, http://www.acronymgeek.com/EHWO (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EHWO, http://www.acronymgeek.com/EHWO (optional description here) (as of Feb. 11, 2012, 14:24). |
| AMA | EHWO. Acronym Geek. February 11, 2012, 14:24. Available at: http://www.acronymgeek.com/EHWO. Accessed February 11, 2012, 14:24. |