| APA | IEIN. (2012, February 14). In Acronym Geek. Retrieved 18:06, February 14, 2012, from http://www.acronymgeek.com/IEIN |
| MLA | "IEIN." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/IEIN>. |
| MHRA | 'IEIN', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/IEIN> [accessed 14 February 2012] |
| Chicago | "IEIN", http://www.acronymgeek.com/IEIN (accessed February 14, 2012). |
| CBE/CSE | IEIN [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/IEIN. |
| Bluebook | IEIN, http://www.acronymgeek.com/IEIN (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, IEIN, http://www.acronymgeek.com/IEIN (optional description here) (as of Feb. 14, 2012, 18:06). |
| AMA | IEIN. Acronym Geek. February 14, 2012, 18:06. Available at: http://www.acronymgeek.com/IEIN. Accessed February 14, 2012, 18:06. |