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판 6개, 최신 판부터
Barron's Educational Series, Inc., 2009, eBook, ISBN 9781438081113
Barron's, 2009, ISBN 9780764142574
Barron's, 2003, ISBN 9780764119729
Barron's, 1996, ISBN 9780812093933
Barron's, 1989, ISBN 9780812041941
Barron's Educational Series, 1983, ISBN 9780812027167