| APA | BTUK. (2012, February 16). In Acronym Geek. Retrieved 17:37, February 16, 2012, from http://www.acronymgeek.com/BTUK |
| MLA | "BTUK." Acronym Geek. (2012). Acronym Geek. 16 Feb 2012 <http://www.acronymgeek.com/BTUK>. |
| MHRA | 'BTUK', Acronym Geek, 16 February 2012, <http://www.acronymgeek.com/BTUK> [accessed 16 February 2012] |
| Chicago | "BTUK", http://www.acronymgeek.com/BTUK (accessed February 16, 2012). |
| CBE/CSE | BTUK [Internet]. Acronym Geek; 2012 Feb 16 [cited 2012 Feb 16]. Available from: http://www.acronymgeek.com/BTUK. |
| Bluebook | BTUK, http://www.acronymgeek.com/BTUK (last visited February 16, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BTUK, http://www.acronymgeek.com/BTUK (optional description here) (as of Feb. 16, 2012, 17:37). |
| AMA | BTUK. Acronym Geek. February 16, 2012, 17:37. Available at: http://www.acronymgeek.com/BTUK. Accessed February 16, 2012, 17:37. |