| APA | BESI. (2012, February 15). In Acronym Geek. Retrieved 15:32, February 15, 2012, from http://www.acronymgeek.com/BESI |
| MLA | "BESI." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/BESI>. |
| MHRA | 'BESI', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/BESI> [accessed 15 February 2012] |
| Chicago | "BESI", http://www.acronymgeek.com/BESI (accessed February 15, 2012). |
| CBE/CSE | BESI [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/BESI. |
| Bluebook | BESI, http://www.acronymgeek.com/BESI (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BESI, http://www.acronymgeek.com/BESI (optional description here) (as of Feb. 15, 2012, 15:32). |
| AMA | BESI. Acronym Geek. February 15, 2012, 15:32. Available at: http://www.acronymgeek.com/BESI. Accessed February 15, 2012, 15:32. |