APA
                    Malik D. S. &. S. M. K., . (2013). Discrete mathematics : theory and applications. Andover: Cengage.
                
                    Chicago
                    Malik D S & Sen M K, . 2013. Discrete mathematics : theory and applications. Andover: Cengage.
                
                    Harvard
                    Malik D. S. &. S. M. K., . (2013). Discrete mathematics : theory and applications. Andover: Cengage.
                
                    MLA
                    Malik D S & Sen M K, . Discrete mathematics : theory and applications. Andover: Cengage. 2013.