| APA | BDU. (2012, February 14). In Acronym Geek. Retrieved 07:39, February 14, 2012, from http://www.acronymgeek.com/BDU |
| MLA | "BDU." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/BDU>. |
| MHRA | 'BDU', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/BDU> [accessed 14 February 2012] |
| Chicago | "BDU", http://www.acronymgeek.com/BDU (accessed February 14, 2012). |
| CBE/CSE | BDU [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/BDU. |
| Bluebook | BDU, http://www.acronymgeek.com/BDU (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BDU, http://www.acronymgeek.com/BDU (optional description here) (as of Feb. 14, 2012, 07:39). |
| AMA | BDU. Acronym Geek. February 14, 2012, 07:39. Available at: http://www.acronymgeek.com/BDU. Accessed February 14, 2012, 07:39. |