APA
                    Khanna S.K, Justo C E G, . (1980). Highway Engineering. Roorkee: Nemchand & Bros., Roorkee.
                
                    Chicago
                    Khanna S.K, Justo C E G, . 1980. Highway Engineering. Roorkee: Nemchand & Bros., Roorkee.
                
                    Harvard
                    Khanna S.K, Justo C E G, . (1980). Highway Engineering. Roorkee: Nemchand & Bros., Roorkee.
                
                    MLA
                    Khanna S.K, Justo C E G, . Highway Engineering. Roorkee: Nemchand & Bros., Roorkee. 1980.