| APA | ERI. (2012, February 10). In Acronym Geek. Retrieved 17:52, February 10, 2012, from http://www.acronymgeek.com/ERI |
| MLA | "ERI." Acronym Geek. (2012). Acronym Geek. 10 Feb 2012 <http://www.acronymgeek.com/ERI>. |
| MHRA | 'ERI', Acronym Geek, 10 February 2012, <http://www.acronymgeek.com/ERI> [accessed 10 February 2012] |
| Chicago | "ERI", http://www.acronymgeek.com/ERI (accessed February 10, 2012). |
| CBE/CSE | ERI [Internet]. Acronym Geek; 2012 Feb 10 [cited 2012 Feb 10]. Available from: http://www.acronymgeek.com/ERI. |
| Bluebook | ERI, http://www.acronymgeek.com/ERI (last visited February 10, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ERI, http://www.acronymgeek.com/ERI (optional description here) (as of Feb. 10, 2012, 17:52). |
| AMA | ERI. Acronym Geek. February 10, 2012, 17:52. Available at: http://www.acronymgeek.com/ERI. Accessed February 10, 2012, 17:52. |