| APA | HHFZ. (2012, February 14). In Acronym Geek. Retrieved 14:01, February 14, 2012, from http://www.acronymgeek.com/HHFZ |
| MLA | "HHFZ." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/HHFZ>. |
| MHRA | 'HHFZ', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/HHFZ> [accessed 14 February 2012] |
| Chicago | "HHFZ", http://www.acronymgeek.com/HHFZ (accessed February 14, 2012). |
| CBE/CSE | HHFZ [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/HHFZ. |
| Bluebook | HHFZ, http://www.acronymgeek.com/HHFZ (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHFZ, http://www.acronymgeek.com/HHFZ (optional description here) (as of Feb. 14, 2012, 14:01). |
| AMA | HHFZ. Acronym Geek. February 14, 2012, 14:01. Available at: http://www.acronymgeek.com/HHFZ. Accessed February 14, 2012, 14:01. |