| APA | BTBL. (2012, February 14). In Acronym Geek. Retrieved 00:52, February 14, 2012, from http://www.acronymgeek.com/BTBL |
| MLA | "BTBL." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/BTBL>. |
| MHRA | 'BTBL', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/BTBL> [accessed 14 February 2012] |
| Chicago | "BTBL", http://www.acronymgeek.com/BTBL (accessed February 14, 2012). |
| CBE/CSE | BTBL [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/BTBL. |
| Bluebook | BTBL, http://www.acronymgeek.com/BTBL (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BTBL, http://www.acronymgeek.com/BTBL (optional description here) (as of Feb. 14, 2012, 00:52). |
| AMA | BTBL. Acronym Geek. February 14, 2012, 00:52. Available at: http://www.acronymgeek.com/BTBL. Accessed February 14, 2012, 00:52. |