| APA | BTWU. (2012, February 16). In Acronym Geek. Retrieved 06:39, February 16, 2012, from http://www.acronymgeek.com/BTWU |
| MLA | "BTWU." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/BTWU>. |
| MHRA | 'BTWU', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/BTWU> [accessed 16 February 2012] |
| Chicago | "BTWU", http://www.acronymgeek.com/BTWU (accessed February 16, 2012). |
| CBE/CSE | BTWU [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/BTWU. |
| Bluebook | BTWU, http://www.acronymgeek.com/BTWU (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BTWU, http://www.acronymgeek.com/BTWU (optional description here) (as of Feb. 16, 2012, 06:39). |
| AMA | BTWU. Acronym Geek. February 16, 2012, 06:39. Available at: http://www.acronymgeek.com/BTWU. Accessed February 16, 2012, 06:39. |