| APA | OBG. (2012, February 14). In Acronym Geek. Retrieved 09:41, February 14, 2012, from http://www.acronymgeek.com/OBG |
| MLA | "OBG." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/OBG>. |
| MHRA | 'OBG', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/OBG> [accessed 14 February 2012] |
| Chicago | "OBG", http://www.acronymgeek.com/OBG (accessed February 14, 2012). |
| CBE/CSE | OBG [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/OBG. |
| Bluebook | OBG, http://www.acronymgeek.com/OBG (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OBG, http://www.acronymgeek.com/OBG (optional description here) (as of Feb. 14, 2012, 09:41). |
| AMA | OBG. Acronym Geek. February 14, 2012, 09:41. Available at: http://www.acronymgeek.com/OBG. Accessed February 14, 2012, 09:41. |