ISBN: 007313564X (pbk. : alk. paper)
ISBN: 0073216410 (student CD-ROM)
ISBN: 0073216461 (topic finder)
ISBN: 007321650X (compact discs)
ISBN: 0073265322 (student CD-ROM guidebook)
ISBN: 9780073135649 (pbk. : alk. paper)
ISBN: 9780073216461 (topic finder)
ISBN: 9780073216508 (compact discs)
ISBN: 9780073265322 (student CD-ROM guidebook)