| APA | OEIG. (2012, February 15). In Acronym Geek. Retrieved 13:49, February 15, 2012, from http://www.acronymgeek.com/OEIG |
| MLA | "OEIG." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/OEIG>. |
| MHRA | 'OEIG', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/OEIG> [accessed 15 February 2012] |
| Chicago | "OEIG", http://www.acronymgeek.com/OEIG (accessed February 15, 2012). |
| CBE/CSE | OEIG [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/OEIG. |
| Bluebook | OEIG, http://www.acronymgeek.com/OEIG (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, OEIG, http://www.acronymgeek.com/OEIG (optional description here) (as of Feb. 15, 2012, 13:49). |
| AMA | OEIG. Acronym Geek. February 15, 2012, 13:49. Available at: http://www.acronymgeek.com/OEIG. Accessed February 15, 2012, 13:49. |