| APA | ETKS. (2012, February 14). In Acronym Geek. Retrieved 13:42, February 14, 2012, from http://www.acronymgeek.com/ETKS |
| MLA | "ETKS." Acronym Geek. (2012). Acronym Geek. 14 Feb 2012 <http://www.acronymgeek.com/ETKS>. |
| MHRA | 'ETKS', Acronym Geek, 14 February 2012, <http://www.acronymgeek.com/ETKS> [accessed 14 February 2012] |
| Chicago | "ETKS", http://www.acronymgeek.com/ETKS (accessed February 14, 2012). |
| CBE/CSE | ETKS [Internet]. Acronym Geek; 2012 Feb 14 [cited 2012 Feb 14]. Available from: http://www.acronymgeek.com/ETKS. |
| Bluebook | ETKS, http://www.acronymgeek.com/ETKS (last visited February 14, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ETKS, http://www.acronymgeek.com/ETKS (optional description here) (as of Feb. 14, 2012, 13:42). |
| AMA | ETKS. Acronym Geek. February 14, 2012, 13:42. Available at: http://www.acronymgeek.com/ETKS. Accessed February 14, 2012, 13:42. |