| APA | OGR. (2012, February 13). In Acronym Geek. Retrieved 23:12, February 13, 2012, from http://www.acronymgeek.com/OGR |
| MLA | "OGR." Acronym Geek. (2012). Acronym Geek. 13 Feb 2012 <http://www.acronymgeek.com/OGR>. |
| MHRA | 'OGR', Acronym Geek, 13 February 2012, <http://www.acronymgeek.com/OGR> [accessed 13 February 2012] |
| Chicago | "OGR", http://www.acronymgeek.com/OGR (accessed February 13, 2012). |
| CBE/CSE | OGR [Internet]. Acronym Geek; 2012 Feb 13 [cited 2012 Feb 13]. Available from: http://www.acronymgeek.com/OGR. |
| Bluebook | OGR, http://www.acronymgeek.com/OGR (last visited February 13, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OGR, http://www.acronymgeek.com/OGR (optional description here) (as of Feb. 13, 2012, 23:12). |
| AMA | OGR. Acronym Geek. February 13, 2012, 23:12. Available at: http://www.acronymgeek.com/OGR. Accessed February 13, 2012, 23:12. |