Rich, B., Schmidt, P. A., & Schmidt, P. A. (1993). Schaum's outline of theory and problems of elementary algebra (2nd ed.). New York: McGraw-Hill.
Παραπομπή Chicago StyleRich, Barnett, Philip A. Schmidt, and Philip A. Schmidt. Schaum's Outline of Theory and Problems of Elementary Algebra. 2nd ed. New York: McGraw-Hill, 1993.
Παραπομπή MLARich, Barnett, Philip A. Schmidt, and Philip A. Schmidt. Schaum's Outline of Theory and Problems of Elementary Algebra. 2nd ed. New York: McGraw-Hill, 1993.
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