| APA | HHDL'S. (2012, February 13). In Acronym Geek. Retrieved 22:01, February 13, 2012, from http://www.acronymgeek.com/HHDL'S |
| MLA | "HHDL'S." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/HHDL'S>. |
| MHRA | 'HHDL'S', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/HHDL'S> [accessed 13 February 2012] |
| Chicago | "HHDL'S", http://www.acronymgeek.com/HHDL'S (accessed February 13, 2012). |
| CBE/CSE | HHDL'S [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/HHDL'S. |
| Bluebook | HHDL'S, http://www.acronymgeek.com/HHDL'S (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HHDL'S, http://www.acronymgeek.com/HHDL'S (optional description here) (as of Feb. 13, 2012, 22:01). |
| AMA | HHDL'S. Acronym Geek. February 13, 2012, 22:01. Available at: http://www.acronymgeek.com/HHDL'S. Accessed February 13, 2012, 22:01. |