| APA | IER. (2012, February 9). In Acronym Geek. Retrieved 21:03, February 9, 2012, from http://www.acronymgeek.com/IER |
| MLA | "IER." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/IER>. |
| MHRA | 'IER', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/IER> [accessed 9 February 2012] |
| Chicago | "IER", http://www.acronymgeek.com/IER (accessed February 9, 2012). |
| CBE/CSE | IER [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/IER. |
| Bluebook | IER, http://www.acronymgeek.com/IER (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, IER, http://www.acronymgeek.com/IER (optional description here) (as of Feb. 9, 2012, 21:03). |
| AMA | IER. Acronym Geek. February 9, 2012, 21:03. Available at: http://www.acronymgeek.com/IER. Accessed February 9, 2012, 21:03. |