ISBN: 9781457639791 (combined edition)
ISBN: 9781457639807 (v. 1)
ISBN: 9781457639821 (v. 2)
ISBN: 9781457662553 (high school edition)
ISBN: 9781457664137 (v. 2, loose-leaf edition)
ISBN: 9781457664144 (loose-leaf edition)
ISBN: 9781457664151 (v. 1, loose-leaf edition)