APA Style
Microsoft visual basic : programming system for Windows version 3.0. ([s.a.]).
[s.l.]:
Microsoft Corporation.
Chicago Style
Microsoft visual basic : programming system for Windows version 3.0.
.
[s.l.]:
Microsoft Corporation,
[s.a.].
Book.
MLA Style
Microsoft visual basic : programming system for Windows version 3.0.
.
[s.l.]:
Microsoft Corporation,
[s.a.].
Book.
Turabian Style
Microsoft visual basic : programming system for Windows version 3.0.
[s.l.]:
Microsoft Corporation,
[s.a.].
Book.