| APA | HBD. (2012, February 14). In Acronym Geek. Retrieved 07:02, February 14, 2012, from http://www.acronymgeek.com/HBD |
| MLA | "HBD." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/HBD>. |
| MHRA | 'HBD', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/HBD> [accessed 14 February 2012] |
| Chicago | "HBD", http://www.acronymgeek.com/HBD (accessed February 14, 2012). |
| CBE/CSE | HBD [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/HBD. |
| Bluebook | HBD, http://www.acronymgeek.com/HBD (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, HBD, http://www.acronymgeek.com/HBD (optional description here) (as of Feb. 14, 2012, 07:02). |
| AMA | HBD. Acronym Geek. February 14, 2012, 07:02. Available at: http://www.acronymgeek.com/HBD. Accessed February 14, 2012, 07:02. |