Liu C L. (2008). Elements of discrete mathematics (3rd.). McGraw Hill.
Cita Chicago (17th ed.)Liu C L. Elements of Discrete Mathematics. 3rd. New Delhi: McGraw Hill, 2008.
Cita MLA (9th ed.)Liu C L. Elements of Discrete Mathematics. 3rd. McGraw Hill, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.