Liu, C. L. (1985). Elements of discrete mathematics (2nd ed.). New York: McGraw-Hill Book Company.
Παραπομπή Chicago StyleLiu, C. L. Elements of Discrete Mathematics. 2nd ed. New York: McGraw-Hill Book Company, 1985.
Παραπομπή MLALiu, C. L. Elements of Discrete Mathematics. 2nd ed. New York: McGraw-Hill Book Company, 1985.
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