Smith, John, and Carol Jennings.
Horner, Avril, and Anne Rowe, editors.
Wysocki, Anne Frances, et. al.
Horner, Avril, et. al., editors.
Double-Spacing in Word
While you are in MS Word's Paragraph Settings for the Indent, activate (check) the box that says: "Don't add space between paragraphs of the same style." This allows you to double-space, without double-double spacing.
Create the second-line indents of your Works Cited page, as well as manage any hyperlinks you need to include. Below are some videos that explain it - I also go over it in my Dr. P's MLA Style video.