Hardcover 1990 Year Owlswick Press Publisher ISBN-13: 978-0-913896-27-3 ISBN-10: 0-913896-27-6 Buy on Amazon
Paperback 1970 Year Ace Books Publisher ISBN-13: 978-0-441-02295-3 ISBN-10: 0-441-02295-2 Buy on Amazon
Digital Books 2013 Year Gateway / Orion Publisher ISBN-13: 978-0-575-10426-6 ISBN-10: 0-575-10426-0 Not Available for Purchase
Hardcover 1994 Year Oxford University Press, USA Publisher ISBN-13: 978-0-19-214216-0 ISBN-10: 0-19-214216-X Buy on Amazon
Paperback 2003 Year Oxford University Press Publisher ISBN-13: 978-0-19-280382-5 ISBN-10: 0-19-280382-4 Buy on Amazon