| APA | OBIRCH. (2012, February 12). In Acronym Geek. Retrieved 07:37, February 12, 2012, from http://www.acronymgeek.com/OBIRCH |
| MLA | "OBIRCH." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/OBIRCH>. |
| MHRA | 'OBIRCH', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/OBIRCH> [accessed 12 February 2012] |
| Chicago | "OBIRCH", http://www.acronymgeek.com/OBIRCH (accessed February 12, 2012). |
| CBE/CSE | OBIRCH [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/OBIRCH. |
| Bluebook | OBIRCH, http://www.acronymgeek.com/OBIRCH (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OBIRCH, http://www.acronymgeek.com/OBIRCH (optional description here) (as of Feb. 12, 2012, 07:37). |
| AMA | OBIRCH. Acronym Geek. February 12, 2012, 07:37. Available at: http://www.acronymgeek.com/OBIRCH. Accessed February 12, 2012, 07:37. |