| APA | ETLS. (2012, February 15). In Acronym Geek. Retrieved 20:27, February 15, 2012, from http://www.acronymgeek.com/ETLS |
| MLA | "ETLS." Acronym Geek. (2012). Acronym Geek. 15 Feb 2012 <http://www.acronymgeek.com/ETLS>. |
| MHRA | 'ETLS', Acronym Geek, 15 February 2012, <http://www.acronymgeek.com/ETLS> [accessed 15 February 2012] |
| Chicago | "ETLS", http://www.acronymgeek.com/ETLS (accessed February 15, 2012). |
| CBE/CSE | ETLS [Internet]. Acronym Geek; 2012 Feb 15 [cited 2012 Feb 15]. Available from: http://www.acronymgeek.com/ETLS. |
| Bluebook | ETLS, http://www.acronymgeek.com/ETLS (last visited February 15, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ETLS, http://www.acronymgeek.com/ETLS (optional description here) (as of Feb. 15, 2012, 20:27). |
| AMA | ETLS. Acronym Geek. February 15, 2012, 20:27. Available at: http://www.acronymgeek.com/ETLS. Accessed February 15, 2012, 20:27. |