| APA | BTD. (2012, February 14). In Acronym Geek. Retrieved 19:20, February 14, 2012, from http://www.acronymgeek.com/BTD |
| MLA | "BTD." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/BTD>. |
| MHRA | 'BTD', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/BTD> [accessed 14 February 2012] |
| Chicago | "BTD", http://www.acronymgeek.com/BTD (accessed February 14, 2012). |
| CBE/CSE | BTD [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/BTD. |
| Bluebook | BTD, http://www.acronymgeek.com/BTD (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BTD, http://www.acronymgeek.com/BTD (optional description here) (as of Feb. 14, 2012, 19:20). |
| AMA | BTD. Acronym Geek. February 14, 2012, 19:20. Available at: http://www.acronymgeek.com/BTD. Accessed February 14, 2012, 19:20. |