Cohen, D. I. A. (1978). Basic techniques of combinatorial theory (1a ed.). John Wiley & Sons Limited.
Cita Chicago Style (17a ed.)Cohen, Daniel I. A. Basic Techniques of Combinatorial Theory. 1a ed. New York: John Wiley & Sons Limited, 1978.
Cita MLA (9a ed.)Cohen, Daniel I. A. Basic Techniques of Combinatorial Theory. 1a ed. John Wiley & Sons Limited, 1978.
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