VISA

Please get your visa online at https://www.evisa.gov.tr/en/

Visa regulations change according to the countries. When you enter your details to https://www.evisa.gov.tr/en/  will provide exact information according to your country.
 
Alternatively, you can contact Turkish Consulate in your own country, details can be found at the link below: 
http://www.mfa.gov.tr/turkish-representations.en.mfa