(1998). Programming business applications with Microsoft Visual Basic: Version 5.0 / William E. Burrows, Joseph D. Langford.
Chicago-viite (17. p.)Programming Business Applications with Microsoft Visual Basic: Version 5.0 / William E. Burrows, Joseph D. Langford. 1998.
MLA-viite (9. p.)Programming Business Applications with Microsoft Visual Basic: Version 5.0 / William E. Burrows, Joseph D. Langford. 1998.
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