O'BRIEN JAMES A. (1979). COMPUTERS IN BUSINESS MANAGEMENT: AN INTRODUCTION. RICHARD D.IRWIN INC.
Chicago-viite (17. p.)O'BRIEN JAMES A. COMPUTERS IN BUSINESS MANAGEMENT: AN INTRODUCTION. HOMEWOOD ILLINOIS: RICHARD D.IRWIN INC, 1979.
MLA-viite (9. p.)O'BRIEN JAMES A. COMPUTERS IN BUSINESS MANAGEMENT: AN INTRODUCTION. RICHARD D.IRWIN INC, 1979.
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