| APA | BIO. (2012, February 9). In Acronym Geek. Retrieved 13:06, February 9, 2012, from http://www.acronymgeek.com/BIO |
| MLA | "BIO." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/BIO>. |
| MHRA | 'BIO', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/BIO> [accessed 9 February 2012] |
| Chicago | "BIO", http://www.acronymgeek.com/BIO (accessed February 9, 2012). |
| CBE/CSE | BIO [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/BIO. |
| Bluebook | BIO, http://www.acronymgeek.com/BIO (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BIO, http://www.acronymgeek.com/BIO (optional description here) (as of Feb. 9, 2012, 13:06). |
| AMA | BIO. Acronym Geek. February 9, 2012, 13:06. Available at: http://www.acronymgeek.com/BIO. Accessed February 9, 2012, 13:06. |