SPENCER DONALD D. (1985). LEARNING BASIC FOR MICROCOMPUTERS: A WORKTEXT FOR THE IBM. CHARLES E MERRILL PUBLISHING COMPANY.
Chicago-viite (17. p.)SPENCER DONALD D. LEARNING BASIC FOR MICROCOMPUTERS: A WORKTEXT FOR THE IBM. LONDON: CHARLES E MERRILL PUBLISHING COMPANY, 1985.
MLA-viite (9. p.)SPENCER DONALD D. LEARNING BASIC FOR MICROCOMPUTERS: A WORKTEXT FOR THE IBM. CHARLES E MERRILL PUBLISHING COMPANY, 1985.
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