| APA | HHDB. (2012, February 16). In Acronym Geek. Retrieved 01:01, February 16, 2012, from http://www.acronymgeek.com/HHDB |
| MLA | "HHDB." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HHDB>. |
| MHRA | 'HHDB', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HHDB> [accessed 16 February 2012] |
| Chicago | "HHDB", http://www.acronymgeek.com/HHDB (accessed February 16, 2012). |
| CBE/CSE | HHDB [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HHDB. |
| Bluebook | HHDB, http://www.acronymgeek.com/HHDB (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHDB, http://www.acronymgeek.com/HHDB (optional description here) (as of Feb. 16, 2012, 01:01). |
| AMA | HHDB. Acronym Geek. February 16, 2012, 01:01. Available at: http://www.acronymgeek.com/HHDB. Accessed February 16, 2012, 01:01. |