| APA | EST. (2012, February 14). In Acronym Geek. Retrieved 11:43, February 14, 2012, from http://www.acronymgeek.com/EST |
| MLA | "EST." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/EST>. |
| MHRA | 'EST', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/EST> [accessed 14 February 2012] |
| Chicago | "EST", http://www.acronymgeek.com/EST (accessed February 14, 2012). |
| CBE/CSE | EST [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/EST. |
| Bluebook | EST, http://www.acronymgeek.com/EST (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, EST, http://www.acronymgeek.com/EST (optional description here) (as of Feb. 14, 2012, 11:43). |
| AMA | EST. Acronym Geek. February 14, 2012, 11:43. Available at: http://www.acronymgeek.com/EST. Accessed February 14, 2012, 11:43. |