-. (1987). Microsoft GW-basic operating system version 4.01: User's guide and user's reference. Microsoft.
Chicago Style (17th ed.) Citation-. Microsoft GW-basic Operating System Version 4.01: User's Guide and User's Reference. Microsoft, 1987.
MLA (8th ed.) Citation-. Microsoft GW-basic Operating System Version 4.01: User's Guide and User's Reference. Microsoft, 1987.
Warning: These citations may not always be 100% accurate.