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판 6개, 최신 판부터
Thomson Brooks/Cole, 2004, 양장(하드커버), ISBN 9780534423629
Duxbury Press, 2003, 양장(하드커버), ISBN 9780534380588
Wadsworth Publishing Company, 1994, 스프링 제본, ISBN 9780534209735
Duxbury Press, 1994, ISBN 9780534209711
PWS-Kent Pub. Co., 1991, ISBN 9780534924959
Duxbury Press, 1987, ISBN 9780871500656