Biggs, N. (1989). Discrete mathematics (Rev. ed.). Oxford [England] : New York: Clarendon Press ; Oxford University Press.
Trích dẫn kiểu ChicagoBiggs, Norman. Discrete Mathematics. Rev. ed. Oxford [England] : New York: Clarendon Press ; Oxford University Press, 1989.
Deismireacht MLABiggs, Norman. Discrete Mathematics. Rev. ed. Oxford [England] : New York: Clarendon Press ; Oxford University Press, 1989.
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