| APA | BTUA. (2012, February 15). In Acronym Geek. Retrieved 21:30, February 15, 2012, from http://www.acronymgeek.com/BTUA |
| MLA | "BTUA." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/BTUA>. |
| MHRA | 'BTUA', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/BTUA> [accessed 15 February 2012] |
| Chicago | "BTUA", http://www.acronymgeek.com/BTUA (accessed February 15, 2012). |
| CBE/CSE | BTUA [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/BTUA. |
| Bluebook | BTUA, http://www.acronymgeek.com/BTUA (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BTUA, http://www.acronymgeek.com/BTUA (optional description here) (as of Feb. 15, 2012, 21:30). |
| AMA | BTUA. Acronym Geek. February 15, 2012, 21:30. Available at: http://www.acronymgeek.com/BTUA. Accessed February 15, 2012, 21:30. |