| APA | BO. (2012, February 7). In Acronym Geek. Retrieved 22:51, February 7, 2012, from http://www.acronymgeek.com/BO |
| MLA | "BO." Acronym Geek. (2012). Acronym Geek. 7 Feb 2012 <http://www.acronymgeek.com/BO>. |
| MHRA | 'BO', Acronym Geek, 7 February 2012, <http://www.acronymgeek.com/BO> [accessed 7 February 2012] |
| Chicago | "BO", http://www.acronymgeek.com/BO (accessed February 7, 2012). |
| CBE/CSE | BO [Internet]. Acronym Geek; 2012 Feb 7 [cited 2012 Feb 7]. Available from: http://www.acronymgeek.com/BO. |
| Bluebook | BO, http://www.acronymgeek.com/BO (last visited February 7, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BO, http://www.acronymgeek.com/BO (optional description here) (as of Feb. 7, 2012, 22:51). |
| AMA | BO. Acronym Geek. February 7, 2012, 22:51. Available at: http://www.acronymgeek.com/BO. Accessed February 7, 2012, 22:51. |