Paperback, published in by Modern Library
Paperback, published in by Signet Classics
Paperback, published in by Limelight Editions
Hardcover, published in by Association Press
Hardcover, published in by Friends of the Earth
Hardcover, published in by Palgrave Macmillan
Hardcover, published in by Greenwood Press Reprint
Unknown Binding, published in by Folcroft Library Editions
