| APA | ER,A. (2012, February 12). In Acronym Geek. Retrieved 07:35, February 12, 2012, from http://www.acronymgeek.com/ER,A |
| MLA | "ER,A." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/ER,A>. |
| MHRA | 'ER,A', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/ER,A> [accessed 12 February 2012] |
| Chicago | "ER,A", http://www.acronymgeek.com/ER,A (accessed February 12, 2012). |
| CBE/CSE | ER,A [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/ER,A. |
| Bluebook | ER,A, http://www.acronymgeek.com/ER,A (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ER,A, http://www.acronymgeek.com/ER,A (optional description here) (as of Feb. 12, 2012, 07:35). |
| AMA | ER,A. Acronym Geek. February 12, 2012, 07:35. Available at: http://www.acronymgeek.com/ER,A. Accessed February 12, 2012, 07:35. |