| APA | BTR. (2012, February 13). In Acronym Geek. Retrieved 21:51, February 13, 2012, from http://www.acronymgeek.com/BTR |
| MLA | "BTR." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/BTR>. |
| MHRA | 'BTR', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/BTR> [accessed 13 February 2012] |
| Chicago | "BTR", http://www.acronymgeek.com/BTR (accessed February 13, 2012). |
| CBE/CSE | BTR [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/BTR. |
| Bluebook | BTR, http://www.acronymgeek.com/BTR (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BTR, http://www.acronymgeek.com/BTR (optional description here) (as of Feb. 13, 2012, 21:51). |
| AMA | BTR. Acronym Geek. February 13, 2012, 21:51. Available at: http://www.acronymgeek.com/BTR. Accessed February 13, 2012, 21:51. |