| APA | HDD. (2012, February 10). In Acronym Geek. Retrieved 16:35, February 10, 2012, from http://www.acronymgeek.com/HDD |
| MLA | "HDD." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/HDD>. |
| MHRA | 'HDD', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/HDD> [accessed 10 February 2012] |
| Chicago | "HDD", http://www.acronymgeek.com/HDD (accessed February 10, 2012). |
| CBE/CSE | HDD [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/HDD. |
| Bluebook | HDD, http://www.acronymgeek.com/HDD (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HDD, http://www.acronymgeek.com/HDD (optional description here) (as of Feb. 10, 2012, 16:35). |
| AMA | HDD. Acronym Geek. February 10, 2012, 16:35. Available at: http://www.acronymgeek.com/HDD. Accessed February 10, 2012, 16:35. |