| APA | OBDU. (2012, February 16). In Acronym Geek. Retrieved 01:47, February 16, 2012, from http://www.acronymgeek.com/OBDU |
| MLA | "OBDU." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/OBDU>. |
| MHRA | 'OBDU', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/OBDU> [accessed 16 February 2012] |
| Chicago | "OBDU", http://www.acronymgeek.com/OBDU (accessed February 16, 2012). |
| CBE/CSE | OBDU [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/OBDU. |
| Bluebook | OBDU, http://www.acronymgeek.com/OBDU (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OBDU, http://www.acronymgeek.com/OBDU (optional description here) (as of Feb. 16, 2012, 01:47). |
| AMA | OBDU. Acronym Geek. February 16, 2012, 01:47. Available at: http://www.acronymgeek.com/OBDU. Accessed February 16, 2012, 01:47. |