| APA | BAK. (2012, February 10). In Acronym Geek. Retrieved 11:12, February 10, 2012, from http://www.acronymgeek.com/BAK |
| MLA | "BAK." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/BAK>. |
| MHRA | 'BAK', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/BAK> [accessed 10 February 2012] |
| Chicago | "BAK", http://www.acronymgeek.com/BAK (accessed February 10, 2012). |
| CBE/CSE | BAK [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/BAK. |
| Bluebook | BAK, http://www.acronymgeek.com/BAK (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, BAK, http://www.acronymgeek.com/BAK (optional description here) (as of Feb. 10, 2012, 11:12). |
| AMA | BAK. Acronym Geek. February 10, 2012, 11:12. Available at: http://www.acronymgeek.com/BAK. Accessed February 10, 2012, 11:12. |