| APA | DHPI. (2012, February 15). In Acronym Geek. Retrieved 19:06, February 15, 2012, from http://www.acronymgeek.com/DHPI |
| MLA | "DHPI." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/DHPI>. |
| MHRA | 'DHPI', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/DHPI> [accessed 15 February 2012] |
| Chicago | "DHPI", http://www.acronymgeek.com/DHPI (accessed February 15, 2012). |
| CBE/CSE | DHPI [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/DHPI. |
| Bluebook | DHPI, http://www.acronymgeek.com/DHPI (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DHPI, http://www.acronymgeek.com/DHPI (optional description here) (as of Feb. 15, 2012, 19:06). |
| AMA | DHPI. Acronym Geek. February 15, 2012, 19:06. Available at: http://www.acronymgeek.com/DHPI. Accessed February 15, 2012, 19:06. |