| APA | HLDP. (2012, February 16). In Acronym Geek. Retrieved 08:46, February 16, 2012, from http://www.acronymgeek.com/HLDP |
| MLA | "HLDP." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/HLDP>. |
| MHRA | 'HLDP', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/HLDP> [accessed 16 February 2012] |
| Chicago | "HLDP", http://www.acronymgeek.com/HLDP (accessed February 16, 2012). |
| CBE/CSE | HLDP [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/HLDP. |
| Bluebook | HLDP, http://www.acronymgeek.com/HLDP (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HLDP, http://www.acronymgeek.com/HLDP (optional description here) (as of Feb. 16, 2012, 08:46). |
| AMA | HLDP. Acronym Geek. February 16, 2012, 08:46. Available at: http://www.acronymgeek.com/HLDP. Accessed February 16, 2012, 08:46. |