| APA | ETSI. (2012, February 9). In Acronym Geek. Retrieved 20:17, February 9, 2012, from http://www.acronymgeek.com/ETSI |
| MLA | "ETSI." Acronym Geek. (2012). Acronym Geek. 9 Feb 2012 <http://www.acronymgeek.com/ETSI>. |
| MHRA | 'ETSI', Acronym Geek, 9 February 2012, <http://www.acronymgeek.com/ETSI> [accessed 9 February 2012] |
| Chicago | "ETSI", http://www.acronymgeek.com/ETSI (accessed February 9, 2012). |
| CBE/CSE | ETSI [Internet]. Acronym Geek; 2012 Feb 9 [cited 2012 Feb 9]. Available from: http://www.acronymgeek.com/ETSI. |
| Bluebook | ETSI, http://www.acronymgeek.com/ETSI (last visited February 9, 2012). |
| Bluebook: Harvard JOLT | See Acronym Geek, ETSI, http://www.acronymgeek.com/ETSI (optional description here) (as of Feb. 9, 2012, 20:17). |
| AMA | ETSI. Acronym Geek. February 9, 2012, 20:17. Available at: http://www.acronymgeek.com/ETSI. Accessed February 9, 2012, 20:17. |