Leff, L. (2000). Barron's regents exams and answers: Sequential math course. Barron's Educational Series, Inc.
Chicago Style (17. basım) AtıfLeff, Lawrence. Barron's Regents Exams and Answers: Sequential Math Course. New York: Barron's Educational Series, Inc, 2000.
MLA (9th ed.) AtıfLeff, Lawrence. Barron's Regents Exams and Answers: Sequential Math Course. Barron's Educational Series, Inc, 2000.
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