| APA | HLHD. (2012, February 16). In Acronym Geek. Retrieved 23:38, February 16, 2012, from http://www.acronymgeek.com/HLHD |
| MLA | "HLHD." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HLHD>. |
| MHRA | 'HLHD', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HLHD> [accessed 16 February 2012] |
| Chicago | "HLHD", http://www.acronymgeek.com/HLHD (accessed February 16, 2012). |
| CBE/CSE | HLHD [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HLHD. |
| Bluebook | HLHD, http://www.acronymgeek.com/HLHD (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HLHD, http://www.acronymgeek.com/HLHD (optional description here) (as of Feb. 16, 2012, 23:38). |
| AMA | HLHD. Acronym Geek. February 16, 2012, 23:38. Available at: http://www.acronymgeek.com/HLHD. Accessed February 16, 2012, 23:38. |