I get lots of queries about APA referencing. I receive another one over the weekend which prompted me to add this into this blog.
A fantastic web site I found is 'Son of Citation Machine'. I have used this for ages. It was previously just the Citation Machine but was used by so many people it crashed! They rebuilt it (thankfully) as the son of the citation machine. You just click on the APA referencing and then select what sort of material you are wanting to reference. You then enter the relevant details and click the submit button - this will then return your apa reference as well as how to cite in the body text.