Mandell, S. L. (1987). Introduction to computers using the IBM and MS-DOS PCs: West 2.5 version includes the following software : WestWord 2.5, WestCalc 2.5, WestGraph 2.5, WestData 2.5, Westsoft 1.0, student file disk (2nd ed.). West Pub. Co..
Dyfyniad Arddull ChicagoMandell, Steven L. Introduction to Computers Using the IBM and MS-DOS PCs: West 2.5 Version Includes the Following Software : WestWord 2.5, WestCalc 2.5, WestGraph 2.5, WestData 2.5, Westsoft 1.0, Student File Disk. 2nd ed. St. Paul: West Pub. Co., 1987.
Dyfyniad MLAMandell, Steven L. Introduction to Computers Using the IBM and MS-DOS PCs: West 2.5 Version Includes the Following Software : WestWord 2.5, WestCalc 2.5, WestGraph 2.5, WestData 2.5, Westsoft 1.0, Student File Disk. 2nd ed. West Pub. Co., 1987.