| APA | HZOE. (2012, February 16). In Acronym Geek. Retrieved 15:59, February 16, 2012, from http://www.acronymgeek.com/HZOE |
| MLA | "HZOE." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HZOE>. |
| MHRA | 'HZOE', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HZOE> [accessed 16 February 2012] |
| Chicago | "HZOE", http://www.acronymgeek.com/HZOE (accessed February 16, 2012). |
| CBE/CSE | HZOE [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HZOE. |
| Bluebook | HZOE, http://www.acronymgeek.com/HZOE (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HZOE, http://www.acronymgeek.com/HZOE (optional description here) (as of Feb. 16, 2012, 15:59). |
| AMA | HZOE. Acronym Geek. February 16, 2012, 15:59. Available at: http://www.acronymgeek.com/HZOE. Accessed February 16, 2012, 15:59. |