| APA | BOEL. (2012, February 15). In Acronym Geek. Retrieved 14:02, February 15, 2012, from http://www.acronymgeek.com/BOEL |
| MLA | "BOEL." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/BOEL>. |
| MHRA | 'BOEL', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/BOEL> [accessed 15 February 2012] |
| Chicago | "BOEL", http://www.acronymgeek.com/BOEL (accessed February 15, 2012). |
| CBE/CSE | BOEL [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/BOEL. |
| Bluebook | BOEL, http://www.acronymgeek.com/BOEL (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BOEL, http://www.acronymgeek.com/BOEL (optional description here) (as of Feb. 15, 2012, 14:02). |
| AMA | BOEL. Acronym Geek. February 15, 2012, 14:02. Available at: http://www.acronymgeek.com/BOEL. Accessed February 15, 2012, 14:02. |