| APA | OBAO. (2012, February 17). In Acronym Geek. Retrieved 07:18, February 17, 2012, from http://www.acronymgeek.com/OBAO |
| MLA | "OBAO." Acronym Geek. (2012). Acronym Geek. 17 Feb 2012 <http://www.acronymgeek.com/OBAO>. |
| MHRA | 'OBAO', Acronym Geek, 17 February 2012, <http://www.acronymgeek.com/OBAO> [accessed 17 February 2012] |
| Chicago | "OBAO", http://www.acronymgeek.com/OBAO (accessed February 17, 2012). |
| CBE/CSE | OBAO [Internet]. Acronym Geek; 2012 Feb 17 [cited 2012 Feb 17]. Available from: http://www.acronymgeek.com/OBAO. |
| Bluebook | OBAO, http://www.acronymgeek.com/OBAO (last visited February 17, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OBAO, http://www.acronymgeek.com/OBAO (optional description here) (as of Feb. 17, 2012, 07:18). |
| AMA | OBAO. Acronym Geek. February 17, 2012, 07:18. Available at: http://www.acronymgeek.com/OBAO. Accessed February 17, 2012, 07:18. |