Marriage a-la-Mode (Dryden).- The Libertine (Shadwell).- The Rover, Parts 1 and 2 (Behn).- The Kind Keeper (Dryden).- The Orphan (Otway).- The Wives' Excuse (Southerne). Also includes introduction, notes, chronology, select bibliography, and plot summaries.
Various is the correct author for any book with multiple unknown authors, and is acceptable for books with multiple known authors, especially if not all are known or the list is very long (over 50).
If an editor is known, however, Various is not necessary. List the name of the editor as the primary author (with role "editor"). Contributing authors' names follow it.
Note: WorldCat is an excellent resource for finding author information and contents of anthologies.
Shadwell's "Libertine, contained here, is a Don Juan story worth reading, though only the last act derives from the original. He's a very hard libertine to like here...