| APA | BU. (2012, February 14). In Acronym Geek. Retrieved 06:50, February 14, 2012, from http://www.acronymgeek.com/BU |
| MLA | "BU." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/BU>. |
| MHRA | 'BU', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/BU> [accessed 14 February 2012] |
| Chicago | "BU", http://www.acronymgeek.com/BU (accessed February 14, 2012). |
| CBE/CSE | BU [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/BU. |
| Bluebook | BU, http://www.acronymgeek.com/BU (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BU, http://www.acronymgeek.com/BU (optional description here) (as of Feb. 14, 2012, 06:50). |
| AMA | BU. Acronym Geek. February 14, 2012, 06:50. Available at: http://www.acronymgeek.com/BU. Accessed February 14, 2012, 06:50. |