| APA | HLDT. (2012, February 15). In Acronym Geek. Retrieved 21:51, February 15, 2012, from http://www.acronymgeek.com/HLDT |
| MLA | "HLDT." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HLDT>. |
| MHRA | 'HLDT', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HLDT> [accessed 15 February 2012] |
| Chicago | "HLDT", http://www.acronymgeek.com/HLDT (accessed February 15, 2012). |
| CBE/CSE | HLDT [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HLDT. |
| Bluebook | HLDT, http://www.acronymgeek.com/HLDT (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HLDT, http://www.acronymgeek.com/HLDT (optional description here) (as of Feb. 15, 2012, 21:51). |
| AMA | HLDT. Acronym Geek. February 15, 2012, 21:51. Available at: http://www.acronymgeek.com/HLDT. Accessed February 15, 2012, 21:51. |