A Treasury of Classic Poetry brings together over 300 poems from 50 of the world's greatest poets from the 16th to the early 20th century such as Lord Byron Emily Dickinson T.S. Eliot Robert Frost John Keats Edna St. Vincent Millay John Milton Edgar Allan Poe William Shakespeare Percy Bysshe Shelley Wallace Stevens Walt Whitman William Butler Yeats This edition features a bonded-leather binding, a silk ribbon bookmark, gilt-edged pages. A beautiful addition to any home library.
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.