| APA | BTUS. (2012, February 12). In Acronym Geek. Retrieved 01:30, February 12, 2012, from http://www.acronymgeek.com/BTUS |
| MLA | "BTUS." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/BTUS>. |
| MHRA | 'BTUS', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/BTUS> [accessed 12 February 2012] |
| Chicago | "BTUS", http://www.acronymgeek.com/BTUS (accessed February 12, 2012). |
| CBE/CSE | BTUS [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/BTUS. |
| Bluebook | BTUS, http://www.acronymgeek.com/BTUS (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BTUS, http://www.acronymgeek.com/BTUS (optional description here) (as of Feb. 12, 2012, 01:30). |
| AMA | BTUS. Acronym Geek. February 12, 2012, 01:30. Available at: http://www.acronymgeek.com/BTUS. Accessed February 12, 2012, 01:30. |