| APA | HDM. (2012, February 14). In Acronym Geek. Retrieved 02:37, February 14, 2012, from http://www.acronymgeek.com/HDM |
| MLA | "HDM." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/HDM>. |
| MHRA | 'HDM', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/HDM> [accessed 14 February 2012] |
| Chicago | "HDM", http://www.acronymgeek.com/HDM (accessed February 14, 2012). |
| CBE/CSE | HDM [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/HDM. |
| Bluebook | HDM, http://www.acronymgeek.com/HDM (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HDM, http://www.acronymgeek.com/HDM (optional description here) (as of Feb. 14, 2012, 02:37). |
| AMA | HDM. Acronym Geek. February 14, 2012, 02:37. Available at: http://www.acronymgeek.com/HDM. Accessed February 14, 2012, 02:37. |