Biggs,Norman.L. (2012). Discrete Mathematics (2nd ed.). Oxford Uni.
Cita Chicago (17th ed.)Biggs,Norman.L. Discrete Mathematics. 2nd ed. New Delhi: Oxford Uni, 2012.
Cita MLA (9th ed.)Biggs,Norman.L. Discrete Mathematics. 2nd ed. Oxford Uni, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.