Q. How do you reference an article and source in the body of a paper?

Since you don't mention whether your instructor has specified a particular citation format (for example, APA or MLA), we are going to point you toward the excellent resources of the Purdue Online Writing Lab (also known as Purdue OWL).

MLA In-Text Citations: The Basics

In-Text Citations: The Basics (APA)

In-Text Citations: Author/Authors (APA)

Some people find it easier to simply look at examples instead.  If you prefer this approach, be sure to take a look at the APA and MLA sample papers on the Purdue OWL site.