| APA | HZOH. (2012, February 16). In Acronym Geek. Retrieved 19:58, February 16, 2012, from http://www.acronymgeek.com/HZOH |
| MLA | "HZOH." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HZOH>. |
| MHRA | 'HZOH', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HZOH> [accessed 16 February 2012] |
| Chicago | "HZOH", http://www.acronymgeek.com/HZOH (accessed February 16, 2012). |
| CBE/CSE | HZOH [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HZOH. |
| Bluebook | HZOH, http://www.acronymgeek.com/HZOH (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HZOH, http://www.acronymgeek.com/HZOH (optional description here) (as of Feb. 16, 2012, 19:58). |
| AMA | HZOH. Acronym Geek. February 16, 2012, 19:58. Available at: http://www.acronymgeek.com/HZOH. Accessed February 16, 2012, 19:58. |