| APA | 2E. (2012, February 11). In Acronym Geek. Retrieved 21:52, February 11, 2012, from http://www.acronymgeek.com/2E |
| MLA | "2E." Acronym Geek. (2012). Acronym Geek. 11 Feb 2012 <http://www.acronymgeek.com/2E>. |
| MHRA | '2E', Acronym Geek, 11 February 2012, <http://www.acronymgeek.com/2E> [accessed 11 February 2012] |
| Chicago | "2E", http://www.acronymgeek.com/2E (accessed February 11, 2012). |
| CBE/CSE | 2E [Internet]. Acronym Geek; 2012 Feb 11 [cited 2012 Feb 11]. Available from: http://www.acronymgeek.com/2E. |
| Bluebook | 2E, http://www.acronymgeek.com/2E (last visited February 11, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, 2E, http://www.acronymgeek.com/2E (optional description here) (as of Feb. 11, 2012, 21:52). |
| AMA | 2E. Acronym Geek. February 11, 2012, 21:52. Available at: http://www.acronymgeek.com/2E. Accessed February 11, 2012, 21:52. |