| APA | PBD. (2012, February 14). In Acronym Geek. Retrieved 11:39, February 14, 2012, from http://www.acronymgeek.com/PBD |
| MLA | "PBD." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/PBD>. |
| MHRA | 'PBD', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/PBD> [accessed 14 February 2012] |
| Chicago | "PBD", http://www.acronymgeek.com/PBD (accessed February 14, 2012). |
| CBE/CSE | PBD [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/PBD. |
| Bluebook | PBD, http://www.acronymgeek.com/PBD (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PBD, http://www.acronymgeek.com/PBD (optional description here) (as of Feb. 14, 2012, 11:39). |
| AMA | PBD. Acronym Geek. February 14, 2012, 11:39. Available at: http://www.acronymgeek.com/PBD. Accessed February 14, 2012, 11:39. |