| APA | HDEM. (2012, February 17). In Acronym Geek. Retrieved 07:57, February 17, 2012, from http://www.acronymgeek.com/HDEM |
| MLA | "HDEM." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/HDEM>. |
| MHRA | 'HDEM', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/HDEM> [accessed 17 February 2012] |
| Chicago | "HDEM", http://www.acronymgeek.com/HDEM (accessed February 17, 2012). |
| CBE/CSE | HDEM [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/HDEM. |
| Bluebook | HDEM, http://www.acronymgeek.com/HDEM (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HDEM, http://www.acronymgeek.com/HDEM (optional description here) (as of Feb. 17, 2012, 07:57). |
| AMA | HDEM. Acronym Geek. February 17, 2012, 07:57. Available at: http://www.acronymgeek.com/HDEM. Accessed February 17, 2012, 07:57. |