Biggs, N. L. (1985). Discrete mathematics. Clarendon; Oxford University Press.
Cita Chicago (17th ed.)Biggs, Norman L. Discrete Mathematics. Oxford ; New Delhi: Clarendon; Oxford University Press, 1985.
Cita MLA (8th ed.)Biggs, Norman L. Discrete Mathematics. Clarendon; Oxford University Press, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.