| APA | HDW. (2012, February 13). In Acronym Geek. Retrieved 22:00, February 13, 2012, from http://www.acronymgeek.com/HDW |
| MLA | "HDW." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/HDW>. |
| MHRA | 'HDW', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/HDW> [accessed 13 February 2012] |
| Chicago | "HDW", http://www.acronymgeek.com/HDW (accessed February 13, 2012). |
| CBE/CSE | HDW [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/HDW. |
| Bluebook | HDW, http://www.acronymgeek.com/HDW (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HDW, http://www.acronymgeek.com/HDW (optional description here) (as of Feb. 13, 2012, 22:00). |
| AMA | HDW. Acronym Geek. February 13, 2012, 22:00. Available at: http://www.acronymgeek.com/HDW. Accessed February 13, 2012, 22:00. |