LIPSCHUTZ SEYMOUR. (1992). DISCRETE MATHEMATICS: 2000 SOLVED PROBLEMS. MCGRAW-HILL.
Cita Chicago (17th ed.)LIPSCHUTZ SEYMOUR. DISCRETE MATHEMATICS: 2000 SOLVED PROBLEMS. NEW YORK: MCGRAW-HILL, 1992.
Cita MLA (9th ed.)LIPSCHUTZ SEYMOUR. DISCRETE MATHEMATICS: 2000 SOLVED PROBLEMS. MCGRAW-HILL, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.