| APA | DHPO. (2012, February 15). In Acronym Geek. Retrieved 18:14, February 15, 2012, from http://www.acronymgeek.com/DHPO |
| MLA | "DHPO." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/DHPO>. |
| MHRA | 'DHPO', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/DHPO> [accessed 15 February 2012] |
| Chicago | "DHPO", http://www.acronymgeek.com/DHPO (accessed February 15, 2012). |
| CBE/CSE | DHPO [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/DHPO. |
| Bluebook | DHPO, http://www.acronymgeek.com/DHPO (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, DHPO, http://www.acronymgeek.com/DHPO (optional description here) (as of Feb. 15, 2012, 18:14). |
| AMA | DHPO. Acronym Geek. February 15, 2012, 18:14. Available at: http://www.acronymgeek.com/DHPO. Accessed February 15, 2012, 18:14. |