How do you say "Thank you" in Turkish?

 When you want to say "Thank you" in Turkish, you can say, 

Teşekkür ederim.

Thank you 

Or you also say,

Teşekkürler

Thanks

When someone says "Teşekkür ederim", you can respond saying,

Rica ederim.

You are welcome

"C" of "rica" is pronounced "ja", so it sounds like "rija ederim".