| APA | PBAO. (2012, February 16). In Acronym Geek. Retrieved 10:24, February 16, 2012, from http://www.acronymgeek.com/PBAO |
| MLA | "PBAO." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/PBAO>. |
| MHRA | 'PBAO', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/PBAO> [accessed 16 February 2012] |
| Chicago | "PBAO", http://www.acronymgeek.com/PBAO (accessed February 16, 2012). |
| CBE/CSE | PBAO [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/PBAO. |
| Bluebook | PBAO, http://www.acronymgeek.com/PBAO (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, PBAO, http://www.acronymgeek.com/PBAO (optional description here) (as of Feb. 16, 2012, 10:24). |
| AMA | PBAO. Acronym Geek. February 16, 2012, 10:24. Available at: http://www.acronymgeek.com/PBAO. Accessed February 16, 2012, 10:24. |