How do I reference something I've referred to, but not directly quoted. Or do I? I'm writing a report and I've used a website for some of my research. I haven't directly quoted anything from the website but you can tell that's where I got my information from if you know what I mean. 

I'm required to use APA 6th referencing.
The answer to the question, "should I reference X?", is almost always yes.  It is proper to reference sources used in your research even if you don't use direct quotes and regardless of referencing style.