APA
                    Axelson J, . (1998). Serial Port Complete Programming and Circuits for RS 232 and RS 485 Links and Networks. Mumbai: Penram Internationals,Mumbai.
                
                    Chicago
                    Axelson J, . 1998. Serial Port Complete Programming and Circuits for RS 232 and RS 485 Links and Networks. Mumbai: Penram Internationals,Mumbai.
                
                    Harvard
                    Axelson J, . (1998). Serial Port Complete Programming and Circuits for RS 232 and RS 485 Links and Networks. Mumbai: Penram Internationals,Mumbai.
                
                    MLA
                    Axelson J, . Serial Port Complete Programming and Circuits for RS 232 and RS 485 Links and Networks. Mumbai: Penram Internationals,Mumbai. 1998.