| APA | BEO. (2012, February 14). In Acronym Geek. Retrieved 19:23, February 14, 2012, from http://www.acronymgeek.com/BEO |
| MLA | "BEO." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/BEO>. |
| MHRA | 'BEO', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/BEO> [accessed 14 February 2012] |
| Chicago | "BEO", http://www.acronymgeek.com/BEO (accessed February 14, 2012). |
| CBE/CSE | BEO [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/BEO. |
| Bluebook | BEO, http://www.acronymgeek.com/BEO (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BEO, http://www.acronymgeek.com/BEO (optional description here) (as of Feb. 14, 2012, 19:23). |
| AMA | BEO. Acronym Geek. February 14, 2012, 19:23. Available at: http://www.acronymgeek.com/BEO. Accessed February 14, 2012, 19:23. |