Proper Referencing

I heard about one student who, well, he didn't exactly plagiarise. He did know that he had to put quotation marks around material he'd copied from other people's work, and he did know that he had to use references in his essay properly...

...but one of the sources he referenced was an essay from one of those essay mills, those places that churn out papers for students to use for cheating purposes!

Someone needs to do some work on getting this student to understand the "authoritative sources" aspect of referencing other people's work.