| APA | E911. (2012, February 11). In Acronym Geek. Retrieved 20:29, February 11, 2012, from http://www.acronymgeek.com/E911 |
| MLA | "E911." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/E911>. |
| MHRA | 'E911', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/E911> [accessed 11 February 2012] |
| Chicago | "E911", http://www.acronymgeek.com/E911 (accessed February 11, 2012). |
| CBE/CSE | E911 [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/E911. |
| Bluebook | E911, http://www.acronymgeek.com/E911 (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, E911, http://www.acronymgeek.com/E911 (optional description here) (as of Feb. 11, 2012, 20:29). |
| AMA | E911. Acronym Geek. February 11, 2012, 20:29. Available at: http://www.acronymgeek.com/E911. Accessed February 11, 2012, 20:29. |