<link href='http://fonts.googleapis.com/css?family=PT+Sans|Anton' rel='stylesheet' type='text/css' />
That’s what Google tells you to use in your markup to access those fonts. It technically works, but if you stick that in your head and try to validate your HTML with the W3C validator, you’ll get an error that looks like this.
Bad value http://fonts.googleapis.com/css?family=PT+Sans|Anton for attribute href on element link: Illegal character in query: not a URL code point.
The issues are related to that plus-sign and vertical bar. What you need to do is this.
<link href='http://fonts.googleapis.com/css?family=PT%20Sans%7CAnton' rel='stylesheet' type='text/css' />
You can find URL encoding characters here.