| APA | OBAK. (2012, February 11). In Acronym Geek. Retrieved 21:34, February 11, 2012, from http://www.acronymgeek.com/OBAK |
| MLA | "OBAK." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/OBAK>. |
| MHRA | 'OBAK', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/OBAK> [accessed 11 February 2012] |
| Chicago | "OBAK", http://www.acronymgeek.com/OBAK (accessed February 11, 2012). |
| CBE/CSE | OBAK [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/OBAK. |
| Bluebook | OBAK, http://www.acronymgeek.com/OBAK (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OBAK, http://www.acronymgeek.com/OBAK (optional description here) (as of Feb. 11, 2012, 21:34). |
| AMA | OBAK. Acronym Geek. February 11, 2012, 21:34. Available at: http://www.acronymgeek.com/OBAK. Accessed February 11, 2012, 21:34. |