MLA Style
"xe.com Universal Currency Converter™." YourDictionary. LoveToKnow, n.d. Web. 17 April 2013. <http://www.yourdictionary.com/currency.html>.
APA Style
xe.com Universal Currency Converter™. (n.d.). Retrieved April 17th, 2013, from http://www.yourdictionary.com/currency.html