Biggs, N. L. (2007). Discrete Mathematics (2nd.). Oxford University Press.
Cita Chicago (17th ed.)Biggs, Norman L. Discrete Mathematics. 2nd. Oxford University Press, 2007.
Cita MLA (9th ed.)Biggs, Norman L. Discrete Mathematics. 2nd. Oxford University Press, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.