| APA | ER-211. (2012, February 12). In Acronym Geek. Retrieved 13:06, February 12, 2012, from http://www.acronymgeek.com/ER-211 |
| MLA | "ER-211." Acronym Geek. (2012). Acronym Geek. 12 Feb 2012 <http://www.acronymgeek.com/ER-211>. |
| MHRA | 'ER-211', Acronym Geek, 12 February 2012, <http://www.acronymgeek.com/ER-211> [accessed 12 February 2012] |
| Chicago | "ER-211", http://www.acronymgeek.com/ER-211 (accessed February 12, 2012). |
| CBE/CSE | ER-211 [Internet]. Acronym Geek; 2012 Feb 12 [cited 2012 Feb 12]. Available from: http://www.acronymgeek.com/ER-211. |
| Bluebook | ER-211, http://www.acronymgeek.com/ER-211 (last visited February 12, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ER-211, http://www.acronymgeek.com/ER-211 (optional description here) (as of Feb. 12, 2012, 13:06). |
| AMA | ER-211. Acronym Geek. February 12, 2012, 13:06. Available at: http://www.acronymgeek.com/ER-211. Accessed February 12, 2012, 13:06. |