| APA | EIOI. (2012, February 15). In Acronym Geek. Retrieved 05:08, February 15, 2012, from http://www.acronymgeek.com/EIOI |
| MLA | "EIOI." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/EIOI>. |
| MHRA | 'EIOI', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/EIOI> [accessed 15 February 2012] |
| Chicago | "EIOI", http://www.acronymgeek.com/EIOI (accessed February 15, 2012). |
| CBE/CSE | EIOI [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/EIOI. |
| Bluebook | EIOI, http://www.acronymgeek.com/EIOI (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EIOI, http://www.acronymgeek.com/EIOI (optional description here) (as of Feb. 15, 2012, 05:08). |
| AMA | EIOI. Acronym Geek. February 15, 2012, 05:08. Available at: http://www.acronymgeek.com/EIOI. Accessed February 15, 2012, 05:08. |