| APA | HDPQ. (2012, February 15). In Acronym Geek. Retrieved 21:34, February 15, 2012, from http://www.acronymgeek.com/HDPQ |
| MLA | "HDPQ." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/HDPQ>. |
| MHRA | 'HDPQ', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/HDPQ> [accessed 15 February 2012] |
| Chicago | "HDPQ", http://www.acronymgeek.com/HDPQ (accessed February 15, 2012). |
| CBE/CSE | HDPQ [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/HDPQ. |
| Bluebook | HDPQ, http://www.acronymgeek.com/HDPQ (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HDPQ, http://www.acronymgeek.com/HDPQ (optional description here) (as of Feb. 15, 2012, 21:34). |
| AMA | HDPQ. Acronym Geek. February 15, 2012, 21:34. Available at: http://www.acronymgeek.com/HDPQ. Accessed February 15, 2012, 21:34. |